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-(4aalpha,6aS*,7abeta,11aalpha,11bbeta))- 37905-07-0 Jolkinolide A