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  • (3aS,5aS,10bR,12bS)-3a-Ethyl-5-hydroxy-8-methoxy-6-methyl-4-oxo-12a-oxy-3a,4,5,5a,6,11,12,12b-octahydro-1H-6,12a-diaza-indeno[7,1-cd]fluorene-5-carboxylic acid methyl ester

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