The molecule is a nine-membered ketoaldonic acid derivative that is 5,7-diacetamido-3,5,7,9-tetradeoxynon-2-ulopyranosonic acid having L-glycero-alpha-L-manno-configuration. It is a conjugate acid of a pseudaminate.
(2S,4S,5S,6S)-5-acetamido-6-[(1S,2S)-1-acetamido-2-hydroxypropyl]-2,4-dihydroxyoxane-2-carboxylic acid