The present invention relates to a n- [3 - [(4ar, 7as) -2-amino-6- (5-fluoropyrimidin-2-yl) -4,4a, 5,7-tetrahydropyrrole tosylate salt [3,4-d] [1,3] thiazin-7a-yl] -4-fluoro-phenyl] -5-methoxy-pyrazin-2-carboxamide.a presente invenção refere-se a um sal tosilato de n-[3-[(4ar,7as)-2-amino-6-(5-fluoropirimidin-2-il)-4,4a,5,7-tetra-hidropirrolo[3,4-d][1,3]tiazin-7a-il]-4-fluoro-fenil]-5-metóxi-pirazina-2-carboxamida.