Dolutegravir Impurity B

Chemical Name: (4R,​12aR)​-N-​[(2,​4-Difluorophenyl)​methyl]​-​3,​4,​6,​8,​12,​12a-​hexahydro-​7-​hydroxy-​4-​methyl-​6,​8-​dioxo-​2H-pPyrido[1’,​2’:4,​5]​pyrazino[2,​1-​b]​[1,​3]​oxazine-​9-​carboxamide

Synonym: Dolutegravir RR Isomer ;