The molecule is a glycopeptide that is N-propionyl-L-alanyl-D-alpha-glutamine in which the pro-R hydrogen of the propionyl group has been replaced by the oxygen at position 3 of 2-acetamido-2-deoxy-beta-D-glucopyranose. A peptidoglycan constituent of both Gram-positive and Gram-negative bacteria. It has a role as an immunological adjuvant.
(4R)-4-[[(2S)-2-[[(2R)-2-[(2R,3R,4R,5S,6R)-3-acetamido-2,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxypropanoyl]amino]propanoyl]amino]-5-amino-5-oxopentanoic acid