The molecule is a methyl glycoside that consists of methyl 3-(2-glycerylphospho)-beta-D-galactoside having an alpha-L-rhamnosyl residue at the 2-position. The core disaccharide from the Streptococcus pneumoniae type 23F capsular polysaccharide antigen functionalized with a phosphoglycerol side chain. It is a beta-D-galactoside, a disaccharide derivative and a methyl glycoside.
1,3-dihydroxypropan-2-yl [(2R,3S,4S,5R,6R)-3-hydroxy-2-(hydroxymethyl)-6-methoxy-5-[(2S,3R,4R,5R,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-4-yl] hydrogen phosphate