2,4-dioxo-4-[1-(phenylmethyl)pyrrol-3-yl]butanoic acid 2,4-dioxo-4-[1-(phenylmethyl)-3-pyrrolyl]butanoic acid 4-[1-(benzyl)pyrrol-3-yl]-2,4-diketo-butyric acid 4-(1-Benzyl-1H-pyrrol-3-yl)-2,4-dioxo-butyric acid AIDS-105223 AIDS105223