Glycoscience

2,4-Dideoxy-2,4-difluoro-D-glucose is a fluorinated glucose analog that has been synthesized to be used as an imaging agent for positron emission tomography (PET) and single photon emission computed tomography (SPECT). It is labeled with fluorine-18 and can be metabolically incorporated into the cellular glycolytic pathway. 2,4-Dideoxy-2,4-difluoro-D-glucose emits positrons that are detected by PET or SPECT cameras. The incorporation of 2,4-dideoxy-2,4-difluoro--D--glucose into the glycolytic pathway allows it to be used as a marker for positron emission tomography.

The chemical structure of Astragalus polysaccharide is complex and consists of an α-D-(1,4)-Glc and (1,6)-α-D-Glcp backbone, and a branch point at O-6. The molecular weight is approximately 3.01 × 105 Da from Mongolian Astragalus using low concentration of ethanol for precipitation and gel chromatography for purification. Spectral analysis results of 1H NMR and 13C NMR showed that the polysaccharide backbone has a 1,3-linked β-D-Gal residue and the branched portion has β-Glc, 1,6-linked α-Gal; 1,5-linked β-Xyl; 1,4-linked β-Gal; β-D-Gal, 1,2-linked α-Rha; and 1,2,4-linked α-Rha residues.

To assess substrate specificity of galactokinase from S. pneumoniae

1,2,3,4-Tetra-O-acetyl-L-rhamnopyranose is an acetylated disaccharide that is glycosylated with mercuric triflate and glycoalkaloid acceptors. It has been shown to be a glycosylation coupling agent for theophylline in solanum species. 1,2,3,4-Tetra-O-acetyl-L-rhamnopyranose can also act as a steroidal glycoalkaloid acceptor and has been identified in Solanum species.

N-Acetyl-5-bromo-3-indoxyl-2,3,4-tri-O-acetyl-b-D-glucuronic acid methyl ester is a custom synthesis of an acetylated bromoglycoside. This compound is a synthetic modification of the natural product and has been shown to be effective against various bacteria. The synthesis of this compound can be achieved by the click reaction with methyl 2,2'-dithiopropionate and 5,5'-dimethoxytrityl chloride in the presence of trimethylsulfonium iodide. N—Acetyl—5—bromo—3—indoxyl—2,3,4—tri—O—acetyl--b--D--glucuronic acid methyl ester is also a monosaccharide sugar that is a carbohydrate with a high purity and modifies proteins at their active site. It also has

N-(7-Oxadecyl)deoxynojirimycin is a chaperone protein. It belongs to the group of proteins that are deficient in patients with type 1 glycogen storage disease and can be used to treat this condition. N-(7-Oxadecyl)deoxynojirimycin has been shown to bind to the endoplasmic reticulum, thereby preventing the maturation of certain proteins and their transport into other cellular compartments. This agent also has a protective function in muscle cells by preventing protein degradation due to abnormal folding or misfolding. The long-term effect of N-(7-Oxadecyl)deoxynojirimycin on skeletal muscle is unclear, although it has been found to be beneficial in the short term for patients with type 1 glycogen storage disease.