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  • (2R,3aS,4S,5R,5aS,10bS,12bS)-4-Acetoxy-3a-ethyl-5-hydroxy-8-methoxy-6-methyl-2-triisopropylsilanyloxy-2,3,3a,4,5,5a,6,11,12,12b-decahydro-1H-6,12a-diaza-indeno[7,1-cd]fluorene-5-carboxylic acid methyl ester

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