The molecule is an organic cation that is the conjugate acid of legionaminic acid obtained by protonation of both amino groups and deprotonation of the carboxy group; major species at pH 7.3. It is an organic cation and an ammonium ion derivative. It is a conjugate acid of a legionaminic acid.
(2S,4S,5R,6S)-5-azaniumyl-6-[(1R,2R)-1-azaniumyl-2-hydroxypropyl]-2,4-dihydroxyoxane-2-carboxylate