The molecule is a monocarboxylic acid anion that is the conjugate base of glycosmisic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of a (2R,3S)-glycosmisic acid.
(E)-3-[(2R,3S)-2-(4-hydroxy-3-methoxyphenyl)-3-(hydroxymethyl)-7-methoxy-2,3-dihydro-1-benzofuran-5-yl]prop-2-enoate