Building Blocks
Subcategories of "Building Blocks"
- Boronic Acids & Boronic Acid Derivatives(5,778 products)
- Chiral Building Blocks(1,243 products)
- Hydrocarbon Building Blocks(6,099 products)
- Organic Building Blocks(61,038 products)
Found 205376 products of "Building Blocks"
4-(1,3-Dioxaindan-5-yloxy)-5-bromopyrimidine
CAS:Versatile small molecule scaffold
Formula:C11H7BrN2O3Purity:Min. 95%Molecular weight:295.09 g/molRef: 3D-RLC47420
Discontinued product2-(6,7-Difluoro-1-benzofuran-3-yl)acetic acid
CAS:Versatile small molecule scaffold
Formula:C10H6F2O3Purity:Min. 95%Molecular weight:212.15 g/molRef: 3D-RLC75149
Discontinued productN-Propyl-2,3-dihydro-1H-inden-1-amine
CAS:Controlled ProductVersatile small molecule scaffoldFormula:C12H17NPurity:Min. 95%Molecular weight:175.27 g/molRef: 3D-RQB71948
Discontinued product[2-(Propan-2-yloxy)pyridin-4-yl]methanamine
CAS:Versatile small molecule scaffold
Formula:C9H14N2OPurity:Min. 95%Molecular weight:166.22 g/molPB-22 3-carboxyindole metabolite solution
CAS:Controlled ProductPB-22 is a synthetic cannabinoid, which can be classified as a CB1 receptor agonist. It is one of the many cannabinoids that have been created in an attempt to circumvent drug laws by creating compounds that are similar to those found in cannabis but have different chemical structures. PB-22 has shown to increase locomotor activity and stimulate the cb1 receptor in mice. Magnetic resonance spectroscopy (MRS) and assays were used to determine the binding affinity of PB-22 for the CB1 receptor. The MRS data showed that PB-22 bound with high affinity to the CB1 receptor and had a lower affinity for CB2 receptors. This suggests that PB-22 may be more potent than other synthetic cannabinoids, such as JWH-018 and CP 55,940, which bind better with CB2 receptors than CB1 receptors.
PB-22 is an analog of JWH-073 and has been shown to have a stronger effect on locomotor activity than JWHFormula:C14H17NO2Purity:Min. 95%Molecular weight:231.29 g/mol[4-(2-Methoxyethoxy)phenyl]methanamine
CAS:Versatile small molecule scaffold
Formula:C10H15NO2Purity:Min. 95%Molecular weight:181.23 g/molEthyl N-(3-amino-2-methylphenyl)carbamate
CAS:Versatile small molecule scaffold
Formula:C10H14N2O2Purity:Min. 95%Molecular weight:194.23 g/mol1-[(3-Aminophenyl)methyl]piperidin-4-ol
CAS:Versatile small molecule scaffoldFormula:C12H18N2OPurity:Min. 95%Molecular weight:206.28 g/molRef: 3D-RQB75784
Discontinued product2-(5-Amino-2-oxo-1,2-dihydropyridin-1-yl)acetamide
CAS:Versatile small molecule scaffoldFormula:C7H9N3O2Purity:Min. 95%Molecular weight:167.17 g/molRef: 3D-RQB76653
Discontinued product1-[4-(2,4-Dimethylbenzoyl)piperidin-1-yl]ethan-1-one
CAS:Versatile small molecule scaffold
Formula:C16H21NO2Purity:Min. 95%Molecular weight:259.34 g/molRef: 3D-SAC64246
Discontinued product[2-(Methoxymethyl)-1,3-thiazol-5-yl]methanol
CAS:Versatile small molecule scaffold
Formula:C6H9NO2SPurity:Min. 95%Molecular weight:159.21 g/molN-Methylpiperidine-4-carboxamide
CAS:Versatile small molecule scaffold
Formula:C7H14N2OPurity:Min. 95%Molecular weight:142.2 g/molRef: 3D-BAA90369
Discontinued product1-Chloro-4-isocyanobenzene
CAS:1-Chloro-4-isocyanobenzene (1CI) is an organic compound that has been used as a chemical probe for the detection of amines and other molecules on metal surfaces. The frequency shift in Raman spectra, which is observed after the addition of 1CI to the metal surface, is used to detect amines. 1CI has also been shown to be a potent inhibitor of mitochondrial function. This molecule binds to nucleophilic sites on metal surfaces and forms covalent bonds with them, leading to a high degree of inhibition.
1CI can be synthesized in three steps from commercially available starting materials and is relatively easy to purify.Formula:C7H4ClNPurity:Min. 95%Molecular weight:137.56 g/mol2-[3-(Propan-2-yl)phenoxy]acetic acid
CAS:2-[3-(Propan-2-yl)phenoxy]acetic acid is a chemical compound that is used as an additive in benzene, and is a phytotoxic chemical. It prevents the formation of chlorophyll by blocking electron transport and inhibiting photosynthesis. 2-[3-(Propan-2-yl)phenoxy]acetic acid is used to induce callus tissue from lettuce, radish, and other plants. This compound also inhibits the growth of various bacteria including Escherichia coli and Pseudomonas aeruginosa.
Formula:C11H14O3Purity:Min. 95%Molecular weight:194.23 g/molRef: 3D-BAA87852
Discontinued product3-(3-Bromopropyl)oxolane
CAS:Versatile small molecule scaffold
Formula:C7H13BrOPurity:Min. 95%Molecular weight:193.08 g/molRef: 3D-ASB49655
Discontinued product4-[(Chlorosulfonyl)methyl]benzoic acid
CAS:Versatile small molecule scaffold
Formula:C8H7ClO4SPurity:Min. 95%Molecular weight:234.66 g/mol4-(3,4,5-Trifluorophenyl)benzoic acid
CAS:Versatile small molecule scaffold
Formula:C13H7F3O2Purity:Min. 95%Molecular weight:252.19 g/molRef: 3D-AMB90850
Discontinued product4-(2,4-Dichlorophenoxy)benzoic acid
CAS:Versatile small molecule scaffold
Formula:C13H8Cl2O3Purity:Min. 95%Molecular weight:283.1 g/mol6-(1-Pyrrolidinyl)-3-pyridinamine
CAS:Versatile small molecule scaffold
Formula:C9H13N3Purity:(%) Min. 95%Color and Shape:PowderMolecular weight:163.22 g/mol(4-Aminopyridin-2-yl)methanol
CAS:Versatile small molecule scaffold
Formula:C6H8N2OPurity:Min. 95%Molecular weight:124.14 g/mol5,6-Dimethylpyridazin-3(2H)-one
CAS:Versatile small molecule scaffold
Formula:C6H8N2OPurity:Min. 95%Molecular weight:124.14 g/molN-(2-Methylpropyl)pyridin-3-amine
CAS:Versatile small molecule scaffold
Formula:C9H14N2Purity:Min. 95%Molecular weight:150.22 g/molRef: 3D-ABA56010
Discontinued product1-(3-Bromophenyl)-1H-imidazole
CAS:Versatile small molecule scaffold
Formula:C9H7BrN2Purity:Min. 95%Molecular weight:223.07 g/molN-(3-Methylphenyl)-3-oxobutanamide
CAS:Versatile small molecule scaffold
Formula:C11H13NO2Purity:Min. 95%Molecular weight:191.23 g/molRef: 3D-ABA23346
Discontinued product1,3-Diazaspiro[4.4]nonane-2,4-dione
CAS:1,3-Diazaspiro[4.4]nonane-2,4-dione (1) is a new fungicide that was shown to have fungicidal activity in vitro against the grapevine pathogens Plasmopara viticola and Plasmopara obducens. This compound has been isolated from the plant Express erythroxylum coca (Erythroxylum coca). The compound belongs to the class of diaza spiro compounds and is a member of a family of diaza spiro compounds with antifungal activity. One possible mode of action for 1 is that it inhibits the synthesis of DNA by binding to bacterial DNA gyrase.
Formula:C7H10N2O2Purity:Min. 95%Molecular weight:154.17 g/mol3-Acetylpyrrolidine-2,4-dione
CAS:3-Acetylpyrrolidine-2,4-dione is an experimental drug that belongs to the class of metal hydroxides. It has been shown to have anti-tumor activity in vitro and in vivo against a variety of malignant tumors. 3-Acetylpyrrolidine-2,4-dione also inhibits the growth of pigweed and other plants by inhibiting the production of tenuazonic acid. This compound is a tautomeric form of tenuazonic acid, which is also known as 2,4-pentanedione. The carboxylate group on this molecule may be responsible for its herbicidal activity.
Formula:C6H7NO3Purity:Min. 95%Molecular weight:141.12 g/molRef: 3D-AAA69757
Discontinued product2,2,3,3,4,4-Hexafluorobutyric acid
CAS:2,2,3,3,4,4-Hexafluorobutyric acid is a hydroxylated organic compound. It has been shown to be more chemically stable than other quaternary ammonium compounds. 2,2,3,3,4,4-Hexafluorobutyric acid is used as a polymerization initiator for the preparation of cationic polymers. This chemical can also be used to fragment proteins and nucleic acids in order to prepare samples for analysis by mass spectrometry. 2HFBA is reactive and can cause irritation on contact with the skin or eyes. It has been shown that this chemical may have an effect on body mass index and can bind to calcium ions.
Formula:C4H2F6O2Purity:Min. 95%Molecular weight:196.05 g/mol5-(Trifluoromethyl)benzene-1,3-diol
CAS:Versatile small molecule scaffold
Formula:C7H5F3O2Purity:Min. 95%Molecular weight:178.11 g/mol6-Ethoxy-N-(piperidin-4-yl)pyrazin-2-amine
CAS:Versatile small molecule scaffold
Formula:C11H18N4OPurity:Min. 95%Molecular weight:222.29 g/molRef: 3D-SDC05900
Discontinued product2-Amino-1-(3-fluorophenyl)ethanol
CAS:Versatile small molecule scaffold
Formula:C8H10FNOPurity:Min. 95%Molecular weight:155.17 g/molRef: 3D-AAA40296
Discontinued product5-Fluoro-2-nitrobenzoyl chloride
CAS:5-Fluoro-2-nitrobenzoyl chloride is a conformationally locked macrocyclic compound that has been synthesized by solid phase synthesis. It is found in two conformational states and can be made to switch between these two states by applying a force to the molecule. This conformation can be controlled by changing the side chain of 5-fluoro-2-nitrobenzoyl chloride, which can be done experimentally. The conformational behavior of this macrocycle was studied using molecular dynamics simulations and it was found that there are four possible conformations for the molecule. The conformations with different side chains were found to have different energies, which could be used as a measure of their relative stability.
Formula:C7H3ClFNO3Purity:Min. 95%Molecular weight:203.55 g/moltert-Butyl N-{4-ethynylbicyclo[2.2.2]octan-1-yl}carbamate
CAS:Versatile small molecule scaffoldFormula:C15H23NO2Purity:Min. 95%Molecular weight:249.35 g/molRef: 3D-SGC55140
Discontinued product3-Bromo-5-(trifluoromethyl)pyridin-4-amine
CAS:Versatile small molecule scaffold
Formula:C6H4BrF3N2Purity:Min. 95%Molecular weight:241.01 g/molRef: 3D-SGC62288
Discontinued producttert-Butyl 7-hydroxy-1-azaspiro[3.5]nonane-1-carboxylate
CAS:Versatile small molecule scaffold
Formula:C13H23NO3Purity:Min. 95%Molecular weight:241.33 g/molRef: 3D-SLD21134
Discontinued product2-(Iodomethyl)-2-phenyl-1,4-dioxane
CAS:Versatile small molecule scaffold
Formula:C11H13IO2Purity:Min. 95%Molecular weight:304.1 g/molRef: 3D-SLD57129
Discontinued productMethyl 4-chloro-1-ethyl-1H-pyrazole-5-carboxylate
CAS:Versatile small molecule scaffold
Formula:C7H9ClN2O2Purity:Min. 95%Molecular weight:188.61 g/molRef: 3D-SSC71497
Discontinued productEthyl 3-(propan-2-yl)pyrrolidine-3-carboxylate
CAS:Versatile small molecule scaffold
Formula:C10H19NO2Purity:Min. 95%Molecular weight:185.26 g/molRef: 3D-SSC72215
Discontinued product3-Pyrrolidinamine, 1-phenyl-
CAS:Versatile small molecule scaffold
Formula:C10H14N2Purity:Min. 95%Molecular weight:162.23 g/mol2-[(4-Bromophenyl)sulfanyl]-2-methylpropanoic acid
CAS:Versatile small molecule scaffold
Formula:C10H11BrO2SPurity:Min. 95%Molecular weight:275.16 g/molRef: 3D-TAA52716
Discontinued productBis(4-methylpiperazin-1-yl)methane
CAS:Versatile small molecule scaffold
Formula:C11H24N4Purity:Min. 95%Molecular weight:212.34 g/molRef: 3D-TAA73933
Discontinued productMethyl (2S)-2-(2-bromoacetamido)-3-methylbutanoate
CAS:Versatile small molecule scaffoldFormula:C8H14BrNO3Purity:Min. 95%Molecular weight:252.11 g/molRef: 3D-UGA70139
Discontinued product9,9-Difluoro-1,4-dioxaspiro[5.5]undecan-5-one
CAS:Versatile small molecule scaffold
Formula:C9H12F2O3Purity:Min. 95%Molecular weight:206.19 g/molRef: 3D-UGD71258
Discontinued product[3-Bromo-4-(morpholin-4-yl)phenyl]methanol
CAS:Versatile small molecule scaffold
Formula:C11H14BrNO2Purity:Min. 95%Molecular weight:272.14 g/molRef: 3D-USC85031
Discontinued product(3R,4S)-rel-4-Bromotetrahydro-thiophene-3-ol 1,1-dioxide
CAS:Versatile small molecule scaffoldFormula:C4H7BrO3SPurity:Min. 95%Molecular weight:215.07 g/mol3-Amino-N,N-dimethyl-4-nitroaniline
CAS:Versatile small molecule scaffold
Formula:C8H11N3O2Purity:Min. 95%Molecular weight:181.19 g/mol4-(2-Hydroxyethyl)-2,6-dimethoxyphenol
CAS:Controlled Product4-(2-Hydroxyethyl)-2,6-dimethoxyphenol is a phenolic compound that can be extracted from the bark of the Indian tree Terminalia arjuna. The extract has been used in traditional medicine for centuries to treat diabetes and cancer. In vitro studies have shown that this extract inhibits the activity of viruses, including HIV, with a mechanism of action similar to that of indinavir. 4-(2-Hydroxyethyl)-2,6-dimethoxyphenol also has an antioxidant effect and stimulates the production of glutathione reductase and superoxide dismutase by cells in culture. 4-(2-Hydroxyethyl)-2,6-dimethoxyphenol is used as an herbal drug in India and research has found it to be hepatoprotective when administered orally to rats.
Formula:C10H14O4Purity:Min. 95%Color and Shape:PowderMolecular weight:198.22 g/mol3-(2-Bromophenyl)-2-oxopropanoic acid
CAS:Versatile small molecule scaffold
Formula:C9H7BrO3Purity:Min. 95%Molecular weight:243.05 g/molRef: 3D-VEA24065
Discontinued product9-Fluoro-2,3,4,5-tetrahydro-1,4-benzoxazepine hydrochloride
CAS:Versatile small molecule scaffold
Formula:C9H11ClFNOPurity:Min. 95%Molecular weight:203.64 g/molRef: 3D-VWC18668
Discontinued product1-(2,2-Difluoroethyl)-4-nitro-1H-pyrazole-5-carboxylic acid
CAS:Versatile small molecule scaffoldFormula:C6H5F2N3O4Purity:Min. 95%Molecular weight:221.12 g/molRef: 3D-VWC27524
Discontinued product5-Methyl-1,4-thiazepane-1,1-dione hydrochloride
CAS:Versatile small molecule scaffold
Formula:C6H14ClNO2SPurity:Min. 95%Molecular weight:199.7 g/molRef: 3D-VWC27667
Discontinued product2-(2,2,2-Trifluoroethyl)pyrrolidine hydrochloride
CAS:Versatile small molecule scaffold
Formula:C6H11ClF3NPurity:Min. 95%Molecular weight:189.6 g/molRef: 3D-VWC27748
Discontinued product5-[(2,4-Difluorophenyl)methyl]-4-methyl-1,3-thiazol-2-amine hydrobromide
CAS:Versatile small molecule scaffold
Formula:C11H11BrF2N2SPurity:Min. 95%Molecular weight:321.19 g/molRef: 3D-VWC49324
Discontinued product2-Phenoxyethanol-1,1-d2
CAS:Versatile small molecule scaffold
Formula:C8H10O2Purity:Min. 95%Molecular weight:140.18 g/molRef: 3D-WAA27338
Discontinued product1-Boc-piperidine-2-boronic Acid Pinacol Ester
CAS:Versatile small molecule scaffoldFormula:C16H30BNO4Purity:Min. 95%Molecular weight:311.23 g/molRef: 3D-WHD19258
Discontinued product1-Chloro-3-(1,3-dioxolan-2-yl)-1,1-difluoropropan-2-one
CAS:Versatile small molecule scaffold
Formula:C6H7ClF2O3Purity:Min. 95%Molecular weight:200.57 g/molRef: 3D-WMB07899
Discontinued product1-Phenyl-2-(trifluoromethoxy)ethan-1-ol
CAS:Versatile small molecule scaffoldFormula:C9H9F3O2Purity:Min. 95%Molecular weight:206.16 g/molMethyl (S)-3-amino-3-(4-fluorophenyl)propanoate hydrochloride
CAS:Versatile small molecule scaffoldFormula:C10H13ClFNO2Purity:Min. 95%Molecular weight:233.67 g/molRef: 3D-WZB17474
Discontinued product3-Bromo-7-methoxy-2H-1-benzopyran-2-one
CAS:3-Bromo-7-methoxy-2H-1-benzopyran-2-one is a coumarin derivative that has been shown to cause liver lesions in rats. The compound can also inhibit locomotor activity, as well as have a significant effect on the levels of serum prolactin. 3-Bromo-7-methoxy-2H-1-benzopyran-2-one is a ligand for the 5HT2 receptor, and it has been suggested that this may be due to its coordination geometry. In addition, 3BMOP binds to DNA with high affinity and specificity, which suggests that it could be used as an antitumor agent.
Formula:C10H7BrO3Purity:Min. 95%Molecular weight:255.06 g/molN-[(4-Chlorophenyl)methyl]-4,5-dihydro-1,3-thiazol-2-amine
CAS:Versatile small molecule scaffold
Formula:C10H11ClN2SPurity:Min. 95%Molecular weight:226.73 g/molSodium 4,4-difluorocyclohexane-1-sulfinate
CAS:Versatile small molecule scaffold
Formula:C6H9F2NaO2SPurity:Min. 95%Molecular weight:206.19 g/molRef: 3D-XPC01358
Discontinued product1,3-Bis(phenylimino)thiourea
CAS:Versatile small molecule scaffold
Formula:C13H10N4SPurity:Min. 95%Molecular weight:254.31 g/molRef: 3D-YAA21642
Discontinued productMethyl 5-bromo-3-(bromomethyl)furan-2-carboxylate
CAS:Versatile small molecule scaffold
Formula:C7H6Br2O3Purity:Min. 95%Molecular weight:297.93 g/mol3-Bromobenzo[b]thiophen-5-amine
CAS:Versatile small molecule scaffold
Formula:C8H6BrNSPurity:Min. 95%Molecular weight:228.11 g/molRef: 3D-YDA43436
Discontinued product5-cyclopropyl-5-methyl-1,3-oxazolidine-2,4-dione
CAS:Versatile small molecule scaffold
Formula:C7H9NO3Purity:Min. 95%Molecular weight:155.15 g/molRef: 3D-YDA54752
Discontinued product4-Chloro-1,6-dimethyl-1H-pyrazolo[3,4-d]pyrimidine
CAS:Versatile small molecule scaffoldFormula:C7H7ClN4Purity:Min. 95%Molecular weight:182.61 g/mol2-(5-Chloro-1-methyl-1H-imidazol-2-yl)-2,2-difluoroacetic acid hydrochloride
CAS:Versatile small molecule scaffoldFormula:C6H6Cl2F2N2O2Purity:Min. 95%Molecular weight:247 g/molRef: 3D-YGC02390
Discontinued product4-Acetyl-5-methyl-3-(propan-2-yl)-1H-pyrrole-2-carboxylic acid
CAS:Versatile small molecule scaffold
Formula:C11H15NO3Purity:Min. 95%Molecular weight:209.24 g/molRef: 3D-YGC02414
Discontinued product2-Bromo-3,3,3-trifluoro-1-propene
CAS:Controlled Product2-Bromo-3,3,3-trifluoro-1-propene is a chemical compound that has been synthesized in an asymmetric reaction. The reactant is bromopropane and the product is 2,2,2-trifluoropropene. The methylene group on the propene molecule is activated by the nucleophilic attack of a fluoride ion from hydrogen fluoride to form a cavity with a highly strained bond. The kinetic study of this reaction revealed that the activation energy for the reaction is 42 kJ/mol. Palladium-catalyzed coupling reactions are catalyzed by palladium and require nonpolar solvents such as toluene or dichloromethane. This type of reaction has been shown to be exothermic with an isolated yield of 1%.
Formula:C3H2BrF3Purity:Min. 95%Color and Shape:Colorless PowderMolecular weight:174.95 g/mol8-Bromo-2-methylimidazo[1,2-a]pyridine
CAS:Versatile small molecule scaffold
Formula:C8H7N2BrPurity:Min. 95%Molecular weight:211.05 g/mol4-Chloro-2-hydroxy-6-methylphenylboronic acid
CAS:Versatile small molecule scaffoldFormula:C7H8BClO3Purity:Min. 95%Molecular weight:186.4 g/mol4,5-Dihydro-1H-imidazol-2-amine hydrochloride
CAS:Please enquire for more information about 4,5-Dihydro-1H-imidazol-2-amine hydrochloride including the price, delivery time and more detailed product information at the technical inquiry form on this page
Formula:C3H7N3•HClPurity:Min. 95%Molecular weight:121.57 g/molRef: 3D-FD183639
Discontinued product1-Hydroxycyclopentane-1-carbonitrile
CAS:1-Hydroxycyclopentane-1-carbonitrile is a monomer that is hydrolyzed to form benzoin and cyanohydrins. It can be used in the production of scifinder as a monomer or dimerizer.
Formula:C6H9NOPurity:Min. 95%Molecular weight:111.14 g/moltert-Butyl (2,2-difluoro-3-hydroxypropyl)carbamate
CAS:Versatile small molecule scaffoldFormula:C10H13NO4Purity:Min. 95%Molecular weight:211.21 g/mol3-Hydroxy-5-methylpyridine
CAS:3-Hydroxy-5-methylpyridine (3HMP) is a chemical substance that has been classified as an amine. It is a product of the metabolism of purines, which are nitrogenous bases found in DNA and RNA. 3HMP is produced by aerogenic bacteria (such as Enterobacter), and can be used to estimate the number of these bacteria present in water samples. 3HMP has been shown to have antiviral properties against influenza virus, and can be used as a biomarker for the presence of other viruses in animals. 3HMP also has mineralization properties, which have been studied extensively, particularly with regards to pancreatic disease.
Formula:C6H7NOPurity:Min. 95%Color and Shape:PowderMolecular weight:109.13 g/molRef: 3D-FH16174
Discontinued product4,5-Dihydroxy-2,3-Pentanedione
CAS:4,5-Dihydroxy-2,3-pentanedione is a carbonyl compound that is the product of the oxidation of ascorbic acid. It is used in wastewater treatment and has antimicrobial properties against infectious diseases. This compound has been shown to inhibit protein synthesis by binding to the ribosome and preventing the formation of peptide bonds between amino acids. 4,5-Dihydroxy-2,3-pentanedione has also been shown to bind to plasma proteins, which may be due to its acyl chain structure. 4,5-Dihydroxy-2,3-pentanedione can be synthesized in a catalytic mechanism that involves dehydroascorbic acid and molecular oxygen.
Formula:C5H8O4Purity:Min. 95%Color and Shape:PowderMolecular weight:132.11 g/molRef: 3D-FD180770
Discontinued productPiperyline
CAS:Piperyline is an alkanoic acid that has shown to be effective against skin cancer. It also has antimicrobial properties, which may be due to its ability to bind metal ions and form polymeric compounds. Piperyline inhibits microbial growth by inhibiting the synthesis of proteins and nucleic acids. The antimicrobial activity is related to its cationic polymerization with hydroxyl groups, which forms a structure that can inhibit microbial enzymes and disrupt microbial cell membranes. This compound also interacts with the skin's natural lipids, making it difficult for microorganisms to attach and grow on the skin. Piperyline is synthesized in organic chemistry laboratories as an amide precursor of other pharmaceuticals such as penicillin.
Formula:C16H17NO3Purity:Min. 95%Molecular weight:271.31 g/mol
