... -Dihydroxy-2-propoxymethyl) guanine; 2'-NDG; 2'-Nor-2'-deoxyguanosineName ganciclovir; 9 - (1,3 - dihydroxy -2-- C O-methyl) guaninecopyRightMolecular structure ... of ganciclovir, 9 - (1,3 - dihydroxy -2-- C O-methyl) guanine, CAS ... Molecular Formula C9H13N5O4MW 255.23CAS Registry Number 82410-32-0 Ganciclovir