142344-87-4 1H-Imidazole-4-carboxamide, 5-amino-1-(5-deoxy-5-((phenylmethyl)amino)-beta-D-ribofuranosyl)- 5-Amino-1-beta-D-(5'-benzylamino-5'-deoxyribofuranosyl)imidazole-4-carboxamide GP 531 GP-531