2H-Pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-6,8-dione,3,4,12,12a-tetrahydro-4-methyl-7-(phenylmethoxy)-,(4R,12aS)-
2H-Pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-6,8-dione, 3,4,12,12a-tetrahydro-4-methyl-7-(phenylmethoxy)-, (4R,12aS)-
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