173908-23-1 1H-Pyrrole-2-carboxylic acid, 1-[(2-chloro-5-nitrophenyl)sulfonyl]-, ethyl ester AIDS-043437 AIDS043437 Ethyl 1-[(2-chloro-5-nitrophenyl)sulfonyl]-1H-pyrrole-2-carboxylate Pyrrolyl Phenyl Sulfone deriv.