Aminoácidos (AA)

<p>N2-Boc-guanine-9-acetic acid is a versatile building block that is used as a reagent, speciality chemical and intermediate in the synthesis of complex compounds. It has shown high quality, high purity and usefulness as an intermediate in the synthesis of organic molecules. This compound can be used to generate large quantities of guanine derivatives which are important building blocks for many types of research chemicals. N2-Boc-guanine-9-acetic acid is also useful as a reaction component or scaffold in organic syntheses.</p>

<p>4-Methyl-2H-1,4-benzoxazin-3(4H)-one is an organic compound that is a hydrogen chloride salt. It is used in the isolation and identification of catechols. The compound has been shown to form condensation products with cellulose, which are detected using analytical techniques such as chromatography and spectrophotometry. 4-Methyl-2H-1,4-benzoxazin-3(4H)-one has a trifluoride ion as its chromophore, which can be detected using analytical techniques.</p>

<p>N-Phospho-L-arginine lithium salt hydrate is an arginine derivative that has a complex life cycle. It is used as a substrate for ATP synthesis, and also participates in the formation of disulfide bonds during protein folding. N-Phospho-L-arginine lithium salt hydrate is an important component of many enzymes, which are vital to the body's metabolic processes. This compound can be used to study biochemical properties of enzymes in biological samples and infectious diseases, which could lead to new treatments for these diseases.</p>

<p>3-Chloro-4-methoxybenzaldehyde is a chemical compound that belongs to the class of aromatic compounds. It is synthesized by reacting 3-chlorobenzaldehyde with methoxyacetone in a hydroxylation reaction. The asymmetric synthesis of 3-chloro-4-methoxybenzaldehyde was achieved by using a chiral auxiliary, which is an organic molecule that can be used to control the stereochemistry of other reactions. This product has high cytotoxicity and is able to cause melanogenesis (production of melanin) when applied to rat striatal membranes.</p>

2-(3-Methoxyphenoxy)-2-methylpropanoic acid is a reagent, useful intermediate and speciality chemical. It is a versatile building block for the synthesis of complex compounds. This product has CAS No. 140239-94-7, which is a fine chemical with high quality. It is an essential reaction component for the preparation of many other valuable chemicals in the laboratory.

<p>3-Methyl-2-nitrophenol is a hydroxy group that contains a reactive methylene group. It has been shown to be formed by the reaction of nitric acid with alcohols or amines. The rate of formation is influenced by the steric interactions and intramolecular hydrogen bonds present in the reactants. 3-Methyl-2-nitrophenol can react with other molecules to form various reaction products, such as 2-methylphenol, nitrobenzene, and picric acid. 3-Methyl-2-nitrophenol also has phytotoxic properties, which may be due to its ability to inhibit root growth and chlorophyll production in plants.</p>

<p>Marker for oxidative stress; hydrogen acceptor in NADP and NADPH assay</p>

<p>Cyclo(-Pro-Tyr) is a natural product that belongs to the class of antimicrobial agents. It has been shown to inhibit the growth of colorectal adenocarcinoma cells by reducing mitochondrial membrane potential and inhibiting protein synthesis. Cyclo(-Pro-Tyr) also has antimicrobial properties against bacteria, including Enterococcus faecalis and Escherichia coli. The biological properties of Cyclo(-Pro-Tyr) have been investigated in vitro with tissue culture and acetate extracts, demonstrating its ability to inhibit the production of fatty acids, as well as its wound healing abilities. Cyclo(-Pro-Tyr) is a synthetase that uses methyl myristate as a substrate and etoac extract as an electron donor. The enzyme converts methyl myristate into cyclopropane fatty acid ester, which can be used for the synthesis of polymers such as polypropylene and polyethylene terephthalate.</p>

<p>Bz-Arg-AMC·HCl is a fluorescent substrate for the enzyme trypsin. It is used to measure the extent of proteolysis in biological systems and can be used in aquaculture to measure the activity of enzymes in fish stomachs. Bz-Arg-AMC·HCl has been found to be stable over a wide range of temperatures, pH, and salt concentrations.</p>

<p>1,2-Bis-(4-methoxyphenylcyclohexan-1,2-diol) is a high quality reagent that is an important intermediate for the synthesis of complex compounds. It is also a useful building block in the synthesis of fine chemicals and speciality chemicals. This compound can be used as a versatile building block in the synthesis of various organic compounds. 1,2-Bis-(4-methoxyphenylcyclohexan-1,2-diol) is also a reaction component that can be used to synthesize pharmaceuticals and other research chemicals.</p>

<p>2-(4-Ethylphenoxy)-2-methylpropanoic acid is a versatile building block that can be used as a reagent, speciality chemical, or useful intermediate for the synthesis of various compounds. It is also an important reaction component for the synthesis of 2-(4-ethylphenoxy)ethanol and 2-(4-ethylphenoxy)acetic acid. This compound has been identified by the Chemical Abstracts Service (CAS No. 17413-77-3).</p>

<p>4-Methoxy-2-nitroaniline is a molecule that has been shown to be able to form an intramolecular hydrogen bond with the 5' carbon of the sugar ring. This reaction leads to the formation of an alkoxy radical, which reacts with chloride ions in acidic conditions. The formation of this intermediate product is reversible, and can be used for analysis of hydrochloric acid. 4-Methoxy-2-nitroaniline has also been shown to react with diazonium salt in the presence of acid, forming a molecule that contains two amines. This reaction can be reversed by adding hydrogen chloride to the solution and analyzing the solution's acidity.</p>

4,6-Dimethyl-N-phenylpyrimidin-2-amine is a fungicide that is effective against the production of nitrite ion in the liver. It has been shown to be a potent inhibitor of hepatic steatosis. 4,6-Dimethyl-N-phenylpyrimidin-2-amine was also shown to have an inhibitory effect on the growth of fungal strains in vitro. This compound has been demonstrated to be active against a number of plant pathogens and may be useful in postharvest applications. 4,6-Dimethyl-N-phenylpyrimidin-2-amine interacts with the hippocampus formation and may play a role in preventing neurodegenerative diseases such as Alzheimer's disease or Parkinson's disease.

<p>Laricitrin-3,5'-di-O-glucoside is an organic compound that can be used as a research chemical. Laricitrin-3,5'-di-O-glucoside is a building block for the synthesis of other compounds and has been used in the synthesis of novel antibiotics. This compound is also a useful intermediate in the production of 3,6-dihydroxychalcone.</p>

<p>Please enquire for more information about S-2-Propen-1-yl-L-cysteine ethyl ester hydrochloride including the price, delivery time and more detailed product information at the technical inquiry form on this page</p>

<p>Please enquire for more information about 2-Chloromethyl-3-methyl-4-(2,2,2-trifluoroethoxy)pyridine, hydrochloride including the price, delivery time and more detailed product information at the technical inquiry form on this page</p>

<p>4-Amino-1-Boc-piperidine is a potent inhibitor of the CCR5 receptor. It is an x-ray crystal structure with a hydroxide solution that inhibits the growth of cancer cells. The inhibitor binding site for 4-Amino-1-Boc-piperidine was determined to be the CCR5 receptor, which is located on the surface of hematopoietic cells. The compound has been shown to inhibit human T lymphocyte proliferation in vitro and inhibit HIV replication in infected patients. 4-Amino-1-Boc-piperidine is able to inhibit the growth of cancer cells by blocking the production of cytokines, such as interleukin 2, that are needed for cell division and growth.</p>

<p>3-Fluoro-4-methylbenzoic acid is an organic compound that is used as a ligand in coordination chemistry. This compound is an alkynyl ligand with a selenium atom at the 3 position, and it can be used to make metal complexes with cycloalkyl and heterocycloalkyl rings. 3-Fluoro-4-methylbenzoic acid has been shown to be a potent inhibitor of matrix metalloproteinase activity.</p>

<p>(S,E)-3-(6-Bromopyridin-2-yl)-2-cyano-N-(1-phenylethyl)acrylamide (MBI-23) is a potential antineoplastic agent that has been shown to induce regression of bladder cancer in mice. MBI-23 induces apoptosis by inhibiting the proliferation of cancer cells and inducing differentiation of cancer stem cells. It is also shown to inhibit tumor growth and progression in glioma and prostate cancer models. MBI-23 binds to the KDR receptor subtype, which is activated by organic acids and inhibited by inorganic compounds. This binding leads to constitutive activation of the KDR receptor, thereby inducing apoptosis. The tautomers and stereoisomers of MBI-23 have not been fully elucidated yet.</p>

<p>Cyclo(L-prolyl-L-leucyl) is a cyclic lipopeptide that inhibits the transcription of DNA. It binds to the polymerase chain and blocks the transcription process, which prevents the production of RNA. Cyclo(L-prolyl-L-leucyl) has been shown to have an inhibitory effect on human pathogens such as fungi, protozoa, or bacteria. Cyclo(L-prolyl-L-leucyl) also has anti-cancer properties and is used for cancer treatment. Cyclo(L-prolyl-L-leucyl) is extracted from an acetate extract and purified by chromatography. The purified product is then tested in vitro using assays including magnetic resonance spectroscopy.</p>

<p>2-Methoxyhydroquinone is a reactive phenolic compound that is used as an antioxidant in nutrient solutions. The compound reacts with a hydroxyl group to form 2,2-bis(4-hydroxyphenyl)propane through the addition of hydrogen bonds. It is also used for wastewater treatment and in radiation-induced polymerization reactions. 2-Methoxyhydroquinone can react with alcohol residues on proteins to form p-hydroxybenzoic acid esters. In addition, this compound has been shown to be an excellent enzyme substrate, which may result from its ability to undergo hydrogen bonding interactions with the enzyme active site.</p>

<p>2-Chloro-5-methoxybenzonitrile is an organic compound that has a chlorinated methoxy group and a cyano group. It is synthesized by the reaction of 2-chloro-5-hydroxybenzonitrile with sulfuryl chloride in the presence of potassium carbonate. The yield of this reaction can be increased by adding a chlorinated solvent such as dichloromethane or chloroform. 2-Chloro-5-methoxybenzonitrile is used in the synthesis of various drugs and other organic compounds, such as amides and benzene ring compounds.</p>

<p>N-Acetyl-L-Phenylalanine is a reactive compound that is involved in the metabolism of amino acids. It has been shown to inhibit liver cell growth and induce apoptosis. The reaction mechanism of N-acetyl-L-phenylalanine has been extensively studied, with studies showing it to react with carbonyl oxygens, hydrogen bond, and intramolecular hydrogen. N-Acetyl-L-phenylalanine has also been shown to have an optimum pH of 6.5 and its chemical formula is C10H11NO2.</p>

<p>2-Bromo-4-methylpyridine is an organic compound that is used in the synthesis of other compounds. It has been shown to be a potent anticancer agent, inhibiting cell function and inducing apoptosis. 2-Bromo-4-methylpyridine can be used to detect autofluorescent cells by photoreceptor cell fluorescence. This compound also induces lipofuscin accumulation in red blood cells as a result of its protonation, which leads to decreased membrane fluidity and oxidative stress.</p>

<p>2-Hydroxy-3-methoxybenzyl alcohol is a phenolic compound that belongs to the class of mandelonitrile. It is an envenomation agent that has been shown to have a molecular weight of 146, and is synthesized by reacting 2-hydroxy-4-methoxybenzaldehyde with formic acid. This drug also has been shown to have high binding affinity for the androgen receptor, which allows it to be used as an antihormone therapy. 2-Hydroxyl-3-methoxybenzyl alcohol binds to hormone receptors in cells and prevents them from binding with the hormones needed for transcription. The hydroxyl group on this molecule allows it to act as an acceptor for other molecules in reactions involving formylation and hydroxylation reactions.</p>

<p>3-Phenyl-4-phthalazinone-1-acetic acid (3PPAA) is an organic compound that can be used to synthesize gold nanoparticles. Gold nanoparticles are ferroelectric and have a dipole moment. 3PPAA can be modeled using simulations with the panthera program, which is able to predict the effect of various parameters on the morphology of the particles. The shape of the gold nanoparticles can be controlled by changing the concentration of 3PPAA in water and by adding or removing a stabilizing agent such as sodium bicarbonate. 3PPAA has been shown to have a strong interaction with mitochondrial DNA, which could lead to death of cells by interfering with mitochondrial function.</p>

<p>24-Methylenecycloartan-3-ol is an enzyme form of a fatty acid that is found in the leaves and bark of Eucalyptus. It has been shown to inhibit cholesterol esterase, which is an enzyme involved in the production of cholesterol. This compound also inhibits acetylcholinesterase, an enzyme that regulates the activity of acetylcholine at the neuromuscular junction. 24-Methylenecycloartan-3-ol is toxic to rats when administered orally at doses of 1 g/kg or greater. The LD50 for this compound when administered intravenously to rats was found to be 7 mg/kg.</p>

<p>L-glutamic acid di-tert-butyl ester hydrochloride is a synthetic glutamic acid conjugate that can be used in the treatment of cancer. L-Glutamic acid di-tert-butyl ester hydrochloride is a substrate for many enzymes, such as glutamate transporters and glutaminase, which are found in tumor cells. It has been shown to decrease the uptake of docetaxel by tumor xenografts in mice. The expression of L-Glutamic acid di-tert-butyl ester hydrochloride has been observed in tissues during cancerous growth and it is expressed at higher levels than in normal tissues.</p>

<p>5-Nitro-m-phenylenediamine is an organic compound that has the chemical formula CHNO. It is a white crystalline solid with a melting point of 158 °C. The compound is soluble in water and other polar solvents but insoluble in nonpolar solvents such as hexane. 5-Nitro-m-phenylenediamine can be prepared by nitration of m-phenylenediamine, which produces the desired product in about 30% yield and with impurities that must be removed by fractional crystallization. The compound is used as an intermediate for making dyes and pharmaceuticals.</p>

<p>Imatinib is an anticancer drug that belongs to the class of trimethyls. It is a potent inhibitor of tyrosine-specific protein kinases, including Bcr-Abl and Src family kinases. It has been shown to have antineoplastic properties in human cells in vitro. Imatinib is structurally similar to the anticancer agent lapatinib and inhibits G1 phase cell cycle progression by preventing phosphorylation of retinoblastoma protein (Rb). Imatinib is also genotoxic due to its structural similarity to other known genotoxic compounds such as bromo-2′-deoxyuridine and 2-chloroimidazole.</p>

<p>5-Methoxy-2-(trifluoromethyl)benzaldehyde (5MFBA) is a potential anticancer compound that has been shown to inhibit the growth of pancreatic cancer cells. 5MFBA is formed by the reaction of methoxybenzene and trifluoromethyl bromide in the presence of copper chloride, which acts as a dehydrogenase. This compound also has prognostic and clinicopathological implications in patients with pancreatic cancer, as well as staining properties in tissues. 5MFBA modulates biological function via reactive oxygen species (ROS) production, which induces cell apoptosis. Research on this compound has been done on cancer tissues from various organs, including breast and prostate cancers.</p>

<p>5-Bromo-2-methoxyphenyl)acetonitrile is a chemical building block that can be used in the synthesis of complex compounds. It is a versatile intermediate that can be used as a reagent in organic reactions. This compound has been shown to be useful as a reaction component and is a high quality product. 5-Bromo-2-methoxyphenyl)acetonitrile has CAS number 7062-40-0 and is listed on the Chemical Abstracts Service (CAS).</p>

<p>2-Fluoro-3-methoxyaniline is a high quality chemical that can be used as an intermediate in the synthesis of complex compounds. It is a reagent and useful building block, with a CAS number of 801282-00-8. 2-Fluoro-3-methoxyaniline can be used to make speciality chemicals and research chemicals, as well as versatile building blocks for reactions. This compound is also a reaction component for the synthesis of other compounds.</p>

<p>Glycine is a non-essential amino acid with a pKa of 9.3. It is a building block of proteins and can be used to synthesize polypeptides. Glycine has been shown to function as an antigen in humans and has been used in pharmaceutical preparations and clinical studies as an immunological agent, such as in the treatment of hepatitis B virus infection. Glycine is also a component of protonated glycoconjugates, which are found in human serum. In addition to its role as an important amino acid, glycine is also an important molecule for kinetic studies because it has a high transfer rate between molecules and macrocyclic structures. This transfer rate can be used to study the conjugation reactions that occur with fluorescent compounds, like fluorescein, which can be used for labeling antibodies.</p>

<p>Estradiol is a form of the hormone estrogen that has been modified to be more lipophilic. It is used in combination with other drugs to treat menopausal symptoms and as an adjuvant for the treatment of breast cancer in women. Estradiol 17-valerate is also used in the treatment of schizophrenia, although not as often as estradiol valerate, because it has a shorter duration of action. The mechanism of action is thought to be due to its ability to increase the concentration of dopamine at nerve terminals by blocking reuptake or inhibiting its metabolism. This may result in relief from distal tubule dysfunction and an improvement in urinary tract symptoms associated with benign prostatic hypertrophy. There are many other possible mechanisms of action including the prevention of bone loss, increased bone age, and increased NMDA receptor binding potentials.</p>

Please enquire for more information about (((2,3-dimethyl-5-oxo-1-phenyl-3-pyrazolin-4-yl)amino)methylene)methane-1,1-dicarbonitrile including the price, delivery time and more detailed product information at the technical inquiry form on this page

<p>5-Amino-2-methoxybenzoic acid (5AMBA) is a hydrogen bond acceptor that binds to peptides and rna. It also has enzymatic activity, which can be used in the treatment of diseases such as Alzheimer's disease. 5AMBA is a small molecule that contains two methoxy groups and one hydrogen. It has been shown to bind to an intramolecular hydrogen bond within a peptide or rna sequence and inhibit enzymatic activity. This inhibition occurs by removing the nucleophile from the enzyme's active site or by sterically hindering access to the enzyme's active site. The luminescent properties of 5AMBA make it an ideal candidate for fluorescent labeling, with applications in biomolecular research.</p>

<p>Ac-Ile-Glu-Thr-Asp-AMC is a reactive, nonsteroidal anti-inflammatory drug that inhibits the activity of survivin, which is an important protein for the survival of prostate cancer cells. Ac-Ile-Glu-Thr-Asp-AMC also inhibits mitochondrial membrane potential in prostate cancer cells and normal peripheral blood mononuclear cells, leading to apoptosis. The biochemical properties of Ac-Ile-Glu-Thr-Asp-AMC are similar to those of other NSAIDs. This drug has been shown to inhibit protein synthesis in experimental models and hydrochloric acid causes mitochondrial membrane depolarization, which triggers apoptosis.</p>

<p>DL-Threonine (or 2-amino-3-hydroxybutanoic acid), is an essential, non-protein amino acid naturally occurring in the human body and it is involved in many biological processes. DL-threonine takes part in the conversion of glycogen into the glucose pathway, supports muscle tissue maintenance and growth, and plays a key role in regulating levels of other amino acids. In addition, DL-threonine helps to provide protection against heat, reduce tiredness and lowers blood pressure. It is an important source of energy for the liver and has been shown to be effective in stimulating liver function, as well as, to have a protective effect against various diseases, including hepatitis and cirrhosis. The liver uses DL-Threonine to produce other amino acids and helping in protein synthesis, such as insulin. The human body can produce DL-threonine from serine by threonine synthase, but not enough to meet the body's needs and thus it must be obtained from food sources or supplements. DL-Threonine can be found in many foods including meat, eggs, soybeans, and dairy products. It can chelate metal cations to improve the absorption of minerals from supplements, which is used in fertilizers for agriculture.</p>

<p>Nalpha,Nalpha-Bis-(carboxymethyl)-L-lysine is a synthetic amino acid that has been used to immobilize proteins and enzymes. It can be used as an inhibitor in cell culture because it binds to the ryanodine receptor, which regulates calcium release from the sarcoplasmic reticulum. This amino acid has also been shown to inhibit kinesin, a protein involved in the movement of organelles along microtubules. In addition, Nalpha,Nalpha-Bis-(carboxymethyl)-L-lysine has been found to be effective against colony-stimulating factor (CSF) and may serve as a model system for enzymatic reactions.</p>

2-Methylbenzamide is an amide with a carbonyl group and an intramolecular hydrogen. It has been shown to have synergic effects when combined with piperonyl butoxide in the treatment of autoimmune diseases. This synergistic effect is due to the inhibition of inflammatory mediator release, which can be achieved by blocking the enzyme cyclooxygenase-2. 2-Methylbenzamide has also been shown to inhibit deuterium isotope effect in cd-1 mice, which could make it beneficial for patients who are unable to tolerate other drugs.

Fosaprepitant is a drug that belongs to the class of drugs used for chemotherapy. It is a prodrug that is converted in vivo to aprepitant, its active form. Fosaprepitant acts as an antagonist of the neurokinin-1 receptor (NK-1R) and inhibits the binding of substance P, which leads to an anti-inflammatory effect. Fosaprepitant has been shown to inhibit the production of substance P in animal models, leading to a reduction in inflammation. In clinical trials, fosaprepitant has been shown to be safe and well tolerated when used with other drugs such as cisplatin and docetaxel in patients with cancer.

<p>1-Phenoxyphthalazine is a n-oxide with life-threatening properties. It is used as a medication for high blood pressure and as an anxiolytic. 1-Phenoxyphazin has been shown to have receptor affinity for the dopamine, serotonin, and noradrenaline receptors. It also blocks the carboxylate ion channels of the central nervous system. 1-Phenoxyphthalazine has been shown to have peroxide and chloride properties, which may contribute to its antihypertensive effects.</p>

<p>Calcium b-hydroxy-b-methylbutyrate monohydrate is a dietary supplement that has been shown to be effective in the treatment of skin conditions such as eczema. It is a calcium salt of the natural fatty acid, b-hydroxy-b-methylbutyrate, which is naturally found in kidney beans. This product may also be used for kidney disease and other health care products. The extract from this compound has been shown to increase collagen production in skin cells, as well as protein synthesis and casein production. Calcium b-hydroxy-b-methylbutyrate monohydrate can also bind with acetate (a chemical compound) and form calcium acetate, which has been shown to have antihypertensive effects.</p>

<p>5-Methylnicotinaldehyde is a chemical compound that belongs to the group of tetrahydropyridines. It is a reagent for producing triphosgene and dimethylformamide. 5-Methylnicotinaldehyde has been shown to inhibit muscarinic acetylcholine receptors, leading to an increase in acetylcholine release from nerve endings. This may be due to its ability to bind with the receptor affinity site at the base of the nicotinic acetylcholine receptor. 5-Methylnicotinaldehyde also has anti-inflammatory properties and can be used as a pesticide.</p>

<p>Z-Gly-Pro-AMC is a substrate molecule that mimics the natural substrate of dipeptidyl peptidase IV (DPP-IV) and is used in the study of plant physiology. It has been shown to inhibit DPP-IV activity by binding to the enzyme’s active site, preventing it from cleaving biologically active peptides. This drug also has an antidiabetic effect, which may be due to its ability to inhibit α-amylase activity. Z-Gly-Pro-AMC also has been shown to increase locomotor activity and reduce body weight in rats with metabolic disorders. Z-Gly-Pro-AMC inhibits serine proteases, such as trypsin, chymotrypsin, elastase, and cathepsin G, which are involved in tumor progression.</p>

<p>2-Chloro-5-methoxyaniline hydrochloride is an intercalating agent that is used in the treatment of cancer. It binds to DNA and causes a breakage of the hydrogen bonds between the two strands, which leads to cell death. The 2-Chloro-5-methoxyaniline hydrochloride molecule has affinity for lactams, which are sugar molecules found in cell walls of bacteria, fungi, and plants. This compound can be metabolized by lactamase enzymes that are found in cancer cells and other cells. The metabolized products are fluorescent, which allows them to be detected by fluorescence microscopy. 2-Chloro-5-methoxyaniline hydrochloride has been shown to inhibit the growth of lung cancer cells and leukemia cells by interfering with their ability to synthesize DNA and RNA.</p>

(R)-Methyl 2-hydroxybutanoate is a synthetic chemical that is used in the esterification reaction to produce methyl esters and as an industrial solvent. This chemical can be synthesized by the reaction of (R)-methyl acetoacetate and hydrochloric acid. The technique for this chemical is a two-step process, which includes hydroxylation followed by hydrogenolysis. The yield rate for this chemical is about 98%.

<p>H-D-Glu(Gly-OH)-OH is a peptide that is used to study the mechanism of glutamate receptors. It has been shown to have an excitatory effect on mouse hippocampal and cerebellar purkinje neurons, with affinity values for membrane channels. It also has been shown to reduce gamma-aminobutyric acid (GABA) levels in the hippocampus and striatum, which may be due to its ability to inhibit glutamic acid decarboxylase. H-D-Glu(Gly-OH)-OH is a potent antagonist of glutamate, binding competitively at the glutamate site on ionotropic receptors. It also inhibits acidic pH and calcium ion concentrations, which are necessary for ionotropic receptor activation.</p>

<p>(R)-(+)-2-Methoxypropionic acid is a derivatization agent that is used to label branched-chain amino acids. It has been shown to react with l-rhamnose, which is found in glycoproteins and polysaccharides.</p>