1H-Oxireno[1,10a]phenanthro[3,2-b]furan-9(7aH)-one, 2,3,4,4a ,5,6,11a,11b-octahydro-4,4,8,11b-tetramethyl-, [4aR-(4a.alpha.,6aS*,7a.beta.,11a.alpha.11b.alpha.)]- Jolkinolide A NSC700085