英文别名1H-[1,4]Oxazino[3,4-c]pyrido[2,1-f][1,2,4]triazine-6,8-dione, 3,4,12,12a-tetrahydro-7-(phenylmethoxy)-, (12aR)-; Baloxavir Impurity 4; (3S)-11-phenylmethoxy-5-oxa-1,2,8-triazatricyclo[8.4.0.03,8]tetradeca-10,13-diene-9,12-dione; (12aR)-3,4,12,12a-Tetrahydro-7-(phenylmethoxy)-1H-[1,4]oxazino[3,4-c]pyrido[2,1-f][1,2,4]triazine-6,8-dione; Baloxavir intermediate3; (12aR)-7-(Benzyloxy)-3,4,12,12a-tetrahydro-1H-[1,4]oxazino[3,4-c]pyrido[2,1-f][1,2,4]triazine-6,8-dione