ethyl 2-((3aS,4aR,5R,6aS,8R,9S,10aR,11aS,13aR)-9-hydroxy-5,9,13a-trimethyl-2-oxotetradecahydro-2H-furo[2',3':6,7]oxepino[3,2-b]pyrano[2,3-f]oxepin-8-yl)acetate

ethyl 2-((3aS,4aR,5R,6aS,8R,9S,10aR,11aS,13aR)-5,9,13a-trimethyl-2-oxo-9-((trimethylsilyl)oxy)tetradecahydro-2H-furo[2',3':6,7]oxepino[3,2-b]pyrano[2,3-f]oxepin-8-yl)acetate

(E)-4-[(2R,3S,4aR,5aS,8R,9S,10aR,11R,12aS)-8-Hydroxy-3,8,11-trimethyl-2-((E)-4-oxo-pent-2-enyl)-3-trimethylsilanyloxy-dodecahydro-1,5,10-trioxa-benzo[b]heptalen-9-yl]-2-methyl-but-2-enoic acid ethyl ester