Bicyclo[4.2.1]
(1S,3S,3aR,4R,5R,6R,7aS)-6-[(1S,2R,3R,6S)-4-(acetyloxy)-6-hydroxy-2-(2-methoxy-2-oxoethyl)-1,3-dimethyl-7,9-dioxabicyclo[4.2.1]non-3-yl]-5-(formyloxy)-3-furan-3-yl-7a-hydroxy-3a-methyl-1-{[(2E)-2-methylbut-2-enoyl]oxy}-7-methylideneoctahydro-1H-inden-4-yl
(3R,3aR,4R,5R,6R,7aS)-6-[(1S,2R,3R,4S,6S)-4-(acetyloxy)-6-hydroxy-2-(2-methoxy-2-oxoethyl)-1,3-dimethyl-7,9-dioxabicyclo[4.2.1]non-3-yl]-5-(formyloxy)-3-(furan-3-yl)-7a-hydroxy-3a-methyl-7-methylidene-1-oxooctahydro-1H-inden-4-yl (2R,3R)-2-hydroxy-3-methy