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4-(butanoylamino)-5-[6,12-di(butan-2-yl)-14-hydroxy-9-(4-hydroxybenzyl)-3,10-dimethyl-20-(2-methylpropyl)-5,8,11,19,22,23-hexaoxoicosahydro-13,17-methanopyrrolo[2,3-t][1,4,7,10,15,18]oxapentaazacyclohenicosin-1(2H)-yl]-5-oxopentanamide