CAS No 180027-83-2 , 18H-16a,19-Metheno-16aH-benzo[b]naphth[2,1-j]oxacyclotetradecin-18,20(1H)-dione,4-(acetyloxy)-2,3,4,4a,6a,9,10,12a,15,16,20a,20b-dodecahydro-21-hydroxy-1,6,7,11,12a,14,15,20a-octamethyl-,(1S,4S,4aS,6aR,7E,11E,12aR,15R,16aS,20aS,20bR)- (9CI)