12H-3,5a-Epoxy-5H-furo(3,4-i)oxepino(4,3-a)xanthen-12-one,1-(acetyloxy)-1,2,3,6,7,7a,10,14,14a,14b-decahydro-6-hydroxy-3,13-dimethoxy-5,5,7a,9,14b-pentamethyl-, (1R,3S,5aR,6R,7aS,14aR,14bS)- 81543-04-6