The invention relates to N - [...] 3 - [(...) 4ar, 7as-2-amino-6 - (...) 5-fluoropyridine-2-yl-4, 4a, 5, 7-tetrahydropyrolo [, 3, 4-D [...] 1, 3, thiazin-7a-yl-4-fluoro-5-methoxy-pyrazine-2-carboxamide].La présente invention concerne un sel de tosylate de n-[3-[(4ar,7as)-2-amino-6-(5- fluoropyrimidin-2-yl)-4,4a,5,7-tétrahydropyrrolo[3,4-d][1,3]thiazin-7a-yl]-4-fluoro- phényl]-5-méthoxy-pyrazine-2-carboxamide.