In addition to tromethamine Salt Crystal with a azabifenilaminobenzoico acid derivative of formula (i), wherein R1 is c1-c4 alkyl, cycloalkyl C3 - C4 - and Cf3 G1 is n, CH, C (CH3) or C (Cf3) G2 is an optionally substituted phenyl Group with chlorine, Fluorine isopropoxi, methoxy, ethoxy,, Trifluoromethoxy, CF3, among others.Preferred compounds are: acid tromethamine Salt of 5 - 2-cyclopropyl-1 - 2 - {[2 - (2,6 - difluorofenil) pyrimidin-5-yl] amino] benzoic acid tromethamine Salt of 5 - 2-cyclopropyl-1 - 2 - {[2 - (2 - (trifluoromethyl) phenyl) amino] pyrimidin-5-yl} tromethamine Salt of benzoic acid 5-methyl-2 - [6 - (2,3 - difluorofenil) pyridin - 3 - il] amino} benzoic, among others. It also relates to a Pharmaceutical composition.These salts inhibit the dehydrogenase (dihidrooroato DHODH) and are useful in the treatment of rheumatoid arthritis, psoriasis, multiple sclerosis, among othersREFERIDA A UNA SAL DE ADICION CRISTALINA DE TROMETAMINA CON UN DERIVADO DE ACIDO DE AZABIFENILAMINOBENZOICO DE FORMULA (I), DONDE R1 ES ALQUILO C1-C4, CICLOALQUILO C3-C4 Y CF3 G1 ES N, CH, C(CH3) O C(CF3) G2 ES UN GRUPO FENILO OPCIONALMENTE SUSTITUIDO CON CLORO, FLUORO, METOXI, ETOXI, ISOPROPOXI, TRIFLUOROMETOXI, CF3, ENTRE OTROS. SON COMPUESTOS PREFERIDOS: SAL DE TROMETAMINA DE ACIDO 5-CICLOPROPIL-2-{[2-(2,6-DIFLUOROFENIL)PIRIMIDIN-5-IL]AMINO}BENZOICO, SAL DE TROMETAMINA DE ACIDO 5-CICLOPROPIL-2-{[2-(2-(TRIFLUOROMETIL)FENIL)PIRIMIDIN-5-IL]AMINO}BENZOICO, SAL DE TROMETAMINA DE ACIDO 5-METIL-2-{[6-(2,3-DIFLUOROFENIL)PIRIDIN-3-IL]AMINO}BENZOICO, ENTRE OTROS. TAMBIEN ESTA REFERIDA A UNA COMPOSICION FARMACEUTICA. DICHAS SALES INHIBEN LA DIHIDROOROATO DESHIDROGENASA (DHODH) Y SON UTILES EN EL TRATAMIENTO DE ARTRITIS REUMATOIDE, ESCLEROSIS MULTIPLE, PSORIASIS, ENTRE OTRAS
