173908-55-9 1H-Pyrrole-2-carboxylic acid, 1-[[2-(butylamino)-5-chlorophenyl]sulfonyl]-, ethyl ester AIDS-043516 AIDS043516 Ethyl 1-[(2-n-Butylamino-5-chlorophenyl)sulfonyl]-1H-pyrrole-2-carboxylate Pyrrolyl Phenyl Sulfone deriv.