The molecule is a monounsaturated fatty acid anion resulting from the deprotonation of the carboxy group of (9Z)-17-hydroxyoctadec-9-enoic acid 17-O-sophoroside. The major species at pH 7.3 It is a conjugate base of a (9Z)-17-hydroxyoctadec-9-enoic acid 17-O-sophoroside.
(Z)-17-[(2R,3R,4S,5S,6R)-4,5-dihydroxy-6-(hydroxymethyl)-3-[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxyoctadec-9-enoate