... )- 10- (acetyloxy)- 3,5-dihydroxy- 4-[(1S,2S,6S,8S,9R,11S)- 2-hydroxy- 11-methyl- 5,7,10-trioxatetracyclo [6.3 ... .1.02,6.09,11] dodec- 3-en- 9-yl]- 4-methyl- 8-{[(2E)- 2-methylbut- 2-enoyl]oxy}octahydro- 1H-furo ... [3’,4’:4,4a]naphtha [1,8-bc]furan- 5,10a(8H)-dicarboxylateMolecular ...