diethyl N-(4-(((2-amino-3,4,5,6,7,8-hexahydro-4-oxo-5-((2'-deoxy-3'-O-acetyluridin-5-yl)methyl)pyrido(3,2-d)pyrimidin-6-yl)methyl)amino)benzoyl)-L-glutamate 5'-(bis-(trichloroethyl) phosphate)