| Synonyms: | 9R-10alpha-Hydroxyepigambogic acid;(2Z)-4-[(1R,3aS,5S,6S,6aR,11S,14aS)-3a,4,5,6,6a,7-Hexahydro-6,8-dihydroxy-3,3,11-trimethyl-13-(3-methyl-2-buten-1-yl)-11-(4-methyl-3-penten-1-yl)-7,15-dioxo-1,5-methano-1H,3H,11H-furo[3,4-g]pyrano[3,2-b]xanthen-1-yl]-2-methyl-2-butenoic acid;2-Butenoic acid, 4-[(1R,3aS,5S,6S,6aR,11S,14aS)-3a,4,5,6,6a,7-hexahydro-6,8-dihydroxy-3,3,11-trimethyl-13-(3-methyl-2-buten-1-yl)-11-(4-methyl-3-penten-1-yl)-7,15-dioxo-1,5-methano-1H,3H,11H-furo[3,4-g]pyrano[3,2-b]xanthen-1-yl]-2-methyl-, (2Z)- |