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2-Butenoic acid,2-methyl-,(3aS,4R,5R,5aR,6R,9aS,9bR)-2,3,3a,4,5,5a,6,7,9a,9b-decahydro-5,6-dihydroxy-5a,9-dimethyl-3-methylene-2-oxonaphtho[1,2-b]furan-4-ylester, (2Z)- related products: