The molecule is an organic anion obtained by deprotonation of one of the hydroxy groups of (R)-demethyl-4-deoxygadusol. It is the major microspecies at pH 7.3 (according to Marvin v 6.2.0.). It is a conjugate base of a (R)-demethyl-4-deoxygadusol.
(4S)-2,4-dihydroxy-4-(hydroxymethyl)-6-oxocyclohexen-1-olate