3,13-Ethano-1H,10H-furo(3,4-c)furo(2',3':6,7)naphtho(2,3-b)pyran-3(3ah)-carboxylic acid, 4-(acetyloxy)-4,5,6a,7,7a,8,12a,13-octahydro-14,15-dihydroxy-8,12a-dimethyl-5,10-dioxo-, methyl ester, (3S-(3-alpha,3a-alpha,4-alpha,6a-alpha,7a-beta,8-beta,12a-alpha,13-alpha,13aS*,14S*,15R*))- 82290-17-3 BRN 4621448 NSC 344025 New quassinoid sergeolide Sergeolide