The molecule is the carboxylic ester that is the ethyl ester of N-acetylneuraminic acid. It is an ethyl ester and a member of acetamides. It derives from a N-acetylneuraminic acid.
ethyl (4S,5R,6R)-5-acetamido-2,4-dihydroxy-6-[(1R,2R)-1,2,3-trihydroxypropyl]oxane-2-carboxylate