The molecule is a methyl glycoside that consists of methyl beta-D-galactoside having an alpha-L-rhamnosyl residue at the 2-position. A core disaccharide from the Streptococcus pneumoniae type 23F capsular polysaccharide antigen. It is a disaccharide derivative, a beta-D-galactoside and a methyl glycoside.
(2S,3R,4R,5R,6S)-2-[(2R,3R,4S,5R,6R)-4,5-dihydroxy-6-(hydroxymethyl)-2-methoxyoxan-3-yl]oxy-6-methyloxane-3,4,5-triol