the invention relates to compounds of magnesium benzo oxazine and dihydro - pyrido oxazine of formula (i) and their salts or solvates, pharmaceutical and / or quality, in which y, v, w, t, q, rL'invention concerne des composés de dihydro-benzo-oxazine et de dihydro-pyrido-oxazine de formule (i) et/ou leurs sels et/ou solvates de qualité pharmaceutique, dans laquelle y, v, w, u, q, r