Bisoxireno[1,10a:3,4]phenanthro[3,2-b]furan-9(7aH)-one, 1,2, 3,4,4a,5,6,11a,11b,11c-decahydro-4,4,8,11c-tetramethyl-, [4aR-(4a.alpha.,6aS*,7a.beta.,10aR*,11a.beta.,11b.alpha.,11c.beta,)]- Jolkinolide B NSC700087