(1alpha,11alpha)-11-(Acetyloxy)-1-(methoxymethyl)-2-oxaandrosta-5,8-dieno(6,5,4-bc)furan-3,7,17-trione 19545-26-7 3H-Furo[4,3,2-de]indeno[4,5-h]-2-benzopyran-3,6,9-trione, 11-(acetyloxy)-1,6b,7,8,9a,10,11,11b- 3H-furo[4,3,2-de]indeno[4,5-h]-2-benzopyran-3,6,9-trione, 11-(acetyloxy)-1, 6b,7,8,9a,10,11,11b-octahydro-1-(methoxymethyl)-9a,11b-dimethyl-, (1S,6bR,9aS,11R,11bR)- Antibiotic SL-2052 KY 12420 SL-2052 Wartmannin Wortmannin octahydro-1-(methoxymethyl)-9a,11b-dimethyl-, [1S-(1alpha,6baalpha,9abeta,11alpha,11bbeta)]-