1-(5'-Phosphoribosyl)-5-formamido-4-imidazolecarboxamide 5'-Phosphoribosyl-5-formamido-4-imidazolecarboxamide 5-Formamido-1-(5-phospho-D-ribosyl)imidazole-4-carboxamide 5-Formamido-1-(5-phosphoribosyl)imidazole-4-carboxamide C04734