GSK1349572;(4R,12aS)-N-[(2,4-Difluorophenyl)methyl]-3,4,6,8,12,12a-hexahydro-7-hydroxy-4-methyl-6,8-dioxo-2H-pyrido[1',2':4,5]pyrazino[2,1-b][1,3]oxazine-9-carboxamide;S/GSK1349572 (GSK1349572);Dolutegravir;GSK1349572(dolutegravir);S/GSK1349572;dolutegravir/GSK1349572/S-349572;Dolutegravir API