7-METHOXY-4-METHYL-6,8-DIOXO-3,4,6,8,12,12A-HEXAHYDRO-2H-PYRIDO(1',2':4,5)PYRAZINO(2,1-B)(1,3)OXAZINE-9-CARBOXYLIC ACID, (4S,12AR)-
7-methoxy-4-methyl-6,8-dioxo-3,4,6,8,12,12a-hexahydro-2h-pyrido(1',2':4,5)pyrazino(2,1-b)(1,3)oxazine-9-carboxylic acid, (4s,12ar)-