The molecule is an amino trisaccharide consisting of beta-L-rhamnose at the reducing end having a 4,6-O-[(1S)-1-carboxyethylidene]-N-acetyl-beta-D-glucosaminyl-(1->3)-alpha-D-galactosyl group attached at the 4-position. It is an amino trisaccharide, a carbohydrate derivative and a cyclic ketal.
(2S,4aR,6S,7R,8R,8aR)-7-acetamido-6-[(2R,3S,4S,5R,6R)-3,5-dihydroxy-2-(hydroxymethyl)-6-[(2S,3R,4S,5R,6S)-4,5,6-trihydroxy-2-methyloxan-3-yl]oxyoxan-4-yl]oxy-8-hydroxy-2-methyl-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxine-2-carboxylic acid