. "{[2-(2-Amino-6-oxo-1,6-dihydro-9H-purin-9-yl)ethoxy]methyl}phosphonic acid" . . . . . "PMEG (antiviral)" . . . . . . . . . "9-((2-Phosphonylmethoxy)ethyl)guanine" . . . . . . "PMEG (antiviral)" .