The molecule is conjugate base of (3Z,5S)-3-(1-hydroxyethylidene)-5-{[4-(3-methylbut-2-en-1-yl)-1H-indol-3-yl]methyl}pyrrolidine-2,4-dione arising from deprotonation of the enolic hydroxy group; major species at pH 7.3. It is a conjugate base of a (3Z,5S)-3-(1-hydroxyethylidene)-5-{[4-(3-methylbut-2-en-1-yl)-1H-indol-3-yl]methyl}pyrrolidine-2,4-dione.
(1Z)-1-[(5S)-5-[[4-(3-methylbut-2-enyl)-1H-indol-3-yl]methyl]-2,4-dioxopyrrolidin-3-ylidene]ethanolate