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  • (4S,4aS,7R,8aR)-4-{(R)-1-Acetoxy-2-[(1R,2S)-2-(tert-butyl-diphenyl-silanyloxymethyl)-1-methyl-5-oxo-cyclopentyl]-ethyl}-4a-formyl-2-hydroxy-7-isopropenyl-5-oxo-3,4,4a,5,6,7,8,8a-octahydro-naphthalene-1-carboxylic acid allyl ester

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