2-[4-(1-methyl-2,4-dioxo-3-propyl-5H-pyrrolo[5,4-e]pyrimidin-6-yl)phenoxy]-N-(4-phenylphenyl)acetamide 2-[4-(2,4-diketo-1-methyl-3-propyl-5H-pyrrolo[5,4-e]pyrimidin-6-yl)phenoxy]-N-(4-phenylphenyl)acetamide 2-[4-(1-methyl-2,4-dioxo-3-propyl-5H-pyrrolo[5,4-e]pyrimidin-6-yl)phenoxy]-N-(4-phenylphenyl)ethanamide