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methyl (5S,7R,9S)-5-ethyl-9-[(2beta,3beta,4beta,5alpha,12beta,19alpha)-3-(hydrazinylcarbonyl)-3,4-dihydroxy-16-methoxy-1-methyl-6,7-didehydroaspidospermidin-15-yl]-5-hydroxy-1,4,5,6,7,8,9,10-octahydro related products: