2-(((Benzoylamino)(isopropylamino)methylene)amino)-5-(ethylthio)-1H-pyrrole-3,4-dicarboxamide AIDS-142831 AIDS142831 N-(3.4-Dicarbamoyl-5-ethylthiopyrrol-2-yl)-N'-benzoyl-N''-isopropy lguanidine NSC661170