Refers to a form of Crystalline anhydrous (1.1 - - hexahidro [- 1 - Lambda * 6 * - tiopiran - 4-yl) {- (S) - 3 - [1 - (6 - methoxy - 5 - methyl - pyridin-3-yl) - 2,3 dihydro - 1H - [3,4 pirido - B] [1,4] oxazin - 7 - iloxi pyrrolidin-1-yl] -} - methanone whose pattern of x-ray diffraction Powder comprises the following Peaks expressed in Degrees two Theta: 9.2, 10.2, 11.9, 13.0, 17.1 20.8 18.7 20.3 17.7,,,, 26.0, among others.It also relates to a Pharmaceutical composition for the treatment of diseases associated with PI3K as inflammatory, Allergic, autoimmune diseases, cancerSE REFIERE A UNA FORMA CRISTALINA ANHIDRA DE (1,1-DIOXO-HEXAHIDRO-1-LAMBDA*6*-TIOPIRAN-4-IL)-{(S)-3-[1-(6-METOXI-5-METIL-PIRIDIN-3-IL)-2,3-DIHIDRO-1H-PIRIDO[3,4-b][1,4]OXAZIN-7-ILOXI]-PIRROLIDIN-1-IL}-METANONA CUYO PATRON DE DIFRACCION DE RAYO X DE POLVO COMPRENDE LOS SIGUIENTES PICOS EXPRESADOS EN GRADOS 2 THETA: 9.1, 10.2, 11.9, 13.0, 17.1, 17.7, 18.7, 20.3, 20.8, 26.0, ENTRE OTROS. TAMBIEN SE REFIERE A UNA COMPOSICION FARMACEUTICA PARA EL TRATAMIENTO DE ENFERMEDADES RELACIONADAS CON PI3K TAL COMO ENFERMEDADES AUTOINMUNES, INFLAMATORIAS, ALERGICAS, CANCER
