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methyl (1S,2S,4aS,4bR,5S,7R,9S,9aR)-2,5-dihydroxy-1-methyl-6-methylidene-13-oxo-1,3,4,5,6,7,9,9a-octahydro-2H-4a,1-(epoxymethano)-4b,7-ethanofluorene-9-carboxylate related products: