2H-pyrido(1',2':4,5)pyrazino(2,1-b)(1,3)oxazine-9-carboxamide, N-((2,4-difluorophenyl)methyl)-3,4,6,8,12,12a-hexahydro-7-hydroxy-4-methyl-6,8-dioxo-, (4R,12aS)-
2H-Pyrido(1',2':4,5)pyrazino(2,1-b)(1,3)oxazine-9-carboxamide, N-((2,4-difluorophenyl)methyl)-3,4,6,8,12,12a-hexahydro-7-hydroxy-4-methyl-6,8-dioxo-, (4R,12aS)