173908-22-0 1H-Pyrrole-2-carboxylic acid, 1-[(2-chloro-5-nitrophenyl)sulfonyl]-, methyl ester AIDS-043435 AIDS043435 Methyl 1-[(2-chloro-5-nitrophenyl)sulfonyl]-1H-pyrrole-2-carboxylate Pyrrolyl Phenyl Sulfone deriv.