N-[3-[2-AMINO-5-(1,1-DIFLUOROETHYL)-4,4A,5,7-TETRAHYDROFURO[3,4-D][1,3]OXAZIN-7A-YL]-4-FLUORO-PHENYL]-5-(TRIFLUOROMETHYL)PYRIDINE-2-CARBOXAMIDE ET SON ISOMERE (4AR,5S,7AS) UTILISES EN TANT QU'INHIBITEUR SELECTIF DE BACE1 DANS LE TRAITEMENT DE LA MALADIE D'ALZHEIMER, PAR EXEMPLE
The present invention provides N-[3-[2-Amino-5-(1,1-difluoroethyl) -4,4a,5,7-tetrahydrofuro[3,4-d][1,3]oxazin-7a-yl]-4-fluoro-phenyl]-5- (trifluoromethyl)pyridine-2-carboxamide, i.e. the compound of Formula I: [Formula should be inserted here] or a pharmaceutically acceptable salt thereof and in particular its (4aR,5S,7aS) isomer as a selective BACE1 inhibitor for treating e.g. Alzheimer's disease and the progression of mild cognitive impairment to Alzheimer's disease.