3-(2-((3-(2-Carboxyethyl)-5-((3-ethylidene-4-methyl-5-oxo-2-pyrrolidinylidene)methyl)-4-methyl-1H-pyrrol-2-yl)methylene)-5-((3-ethyl-4-methyl-2-oxo-2H-pyrrol-5-yl)methylene)-4-methyl-2,5-dihydro-1H-py\trrol-3-yl)propanoic acid AIDS-160549 AIDS160549 NSC635691