55058-63-4 (4R,4aS,5R,8R,8aR)-8-hydroxy-3,4a,5-trimethyl-9-oxo-4,4a,5,6,7,8,8a,9-octahydronaphtho[2,3-b]furan-4-yl (2Z)-2-methylbut-2-enoate 37294-05-6 dimethyl (2aS,3S,4S,4aR,5S,8S,10R,10aS,10bR)-3,5,10-trihydroxy-4-[(1aR,3aS,6aS,7R,7aS)-6a-hydroxy-7a-methyl-3a,6a,7,7a-tetrahydro-2,7-methanofuro[2,3-b]oxireno[e]oxepin-1a(2H)-yl]-4-methyl-8-{[(2E)-2-methylbut-2-enoyl]oxy}octahydro-1H-naphtho[1,8a-c:4,5-b