stemphone

(21E)-21,22-Didehydrocochlioquinone A

(3R)-9-[(1S,2R,3E)-2-Acetyloxy-1,3-dimethyl-3-pentenyl]-1,2,3,4aβ,5,6,6a,12,12aβ,12b-decahydro-12β-hydroxy-3-(1-hydroxy-1-methylethyl)-6aα,12bα-dimethylpyrano[3,2-a]xanthene-8,11-dione