155520-97-1

11a,13a-Methano-13H-oxireno[c][1]benzoxacyclododecin-13,14-dione,10-ethyl-1a,2,3,4,5,6,7,7a,10,11-decahydro-2,4,7a,9-tetramethyl-,[1aS-(1aR*,2R*,4S*,7aS*,10S*,11aS*,13aS*)]-