122537-63-7

3H-Oxireno[1,10a]phenanthro[3,2-b]furan-3,9(7aH)-dione,5-(acetyloxy)-4,4a,5,6,10a,11,11a,11b-octahydro-4,4,8,11b-tetramethyl-,[4aS-(4aa,5a,6aR*,7ab,10ab,11aa,11bb)]-