(1S,3aS,4aR,4bR,6aR,11S,11aR,11bR,13aS)-1-(Furan-3-yl)-4b,7,7,11a,13a-pentamethyl-3,5,9-trioxohexadecahydrooxepino[4',3':3,4]benzo[1,2-f]oxireno[2,3-d]isochromen-11-yl acetate

(1S,3aS,4aR,4bR,6aR,11S,11aR,11bR,13aS)-1-(Furan-3-yl)-4b,7,7,11a,13a-pentamethyl-3,5,9-trioxohexadecahydrooxepino[4',3':3,4]benzo[1,2-f]oxireno[2,3-d]isochromen-11-yl acetate,