(2R,12aS)-7-(benzyloxy)-N-(4-fluorobenzyl)-2-methyl-6,8-dioxo-3,4,6,8,12,12a-hexahydro-2H-[1,3]oxazino[3,2-d]pyrido-[1,2-a]pyrazine-9-carboxamide 在
palladium on activated charcoal 、
氢气 作用下,
生成 (2R,12aS)-N-(4-fluorobenzyl)-7-hydroxy-2-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-carboxamide