bis(6-amino-7H-purin-1-ium)hydrogen(1-hydroxy-2-(1H-imidazol-3-ium-1-yl)-1-phosphonatoethyl)phosphonate tetrahydrate)
bis(6-amino-7h-purin-1-ium)hydrogen(1-hydroxy-2-(1h-imidazol-3-ium-1-yl)-1-phosphonatoethyl)phosphonate tetrahydrate)