Phenylethylamino-4H-pyrimido[4,5-d][1,3]oxazin-2-one compounds of Formula I, formulations containing those compounds, and their use as mutant isocitrate dehydrogenase 1 enzyme inhibitors.Composés de phényléthylamino-4 H-pyrimido [4,5-d] [1,3] oxazin-2-one de Formule I, formulations contenant ces composés, et leur utilisation comme inhibiteurs de l'enzyme isocitrate déshydrogénase 1 mutante.