(2-(2-((2-Amino-1,6-dihydro-6-oxo-9H-purin-9-yl)methyl)phenyl)ethenyl)phosphonic acid 139981-26-3 Mdl 74,428 Mdl 74428 Phosphonic acid, (2-(2-((2-amino-1,6-dihydro-6-oxo-9H-purin-9-yl)methyl)phenyl)ethenyl)-