The molecule is a linear tetrasaccharide derivative consisting of beta-D-glucose, N-acetyl-alpha-D-fucosamine, N-acetyl-alpha-L-quinovosamine and N-acetyl-beta-D-glucosamine residues linked sequentially (1->6), (1->3) and (1->3). It forms an important epitope of the Proteus vulgaris O-specific polysaccharide. It has a role as an epitope.
N-[(2S,3R,4R,5S,6R)-2-[(2S,3S,4S,5S,6S)-3-acetamido-2-[(2R,3R,4R,5S,6R)-3-acetamido-2,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-5-hydroxy-6-methyloxan-4-yl]oxy-4,5-dihydroxy-6-[[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxymethyl]oxan-3-yl]acetamide