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