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