Refers to a compound of formula (i), where B is piridilo 2 -, 3 - piridilo, among others X is Halogen, Nitro, cyano, among others R1 and R2 are identical and are selected from the group of H, halogen, among others R3 and R4 are identical and are selected for the Group h, halogeno, cyano, among others) and S H, - Oh, - cho, among others n is 1 to 4 is a phenyl Group of formula (i), wherein R is Halogen.Nitro, among others, M is 0 - 5. Preferred compounds are n - {2 - [3 - Chloro - 5 - (trifluoromethyl) pyridin-2-yl) - 2-methylpropyl} - 2 - (trifluoromethyl) benzamide, N - [3 - (2 - Chloro - 5 - (trifluoromethyl) pyridin-2-yl] - 1 - Methoxyethyl} - 2 - (trifluoromethyl) benzamide, among others. It also relates to a Pharmaceutical composition that is useful for the control of namatodos.SE REFIERE A UN COMPUESTO DE FORMULA (I), DONDE B ES 2-PIRIDILO, 3-PIRIDILO, ENTRE OTROS X ES HALOGENO, NITRO, CIANO, ENTRE OTROS R1 Y R2 SON IDENTICOS Y SE SELECCIONAN DEL GRUPO DE H, HALOGENO, ENTRE OTROS R3 Y R4 SON IDENTICOS Y SE SELECCIONAN DEL GRUPO DE H, HALOGENO CIANO, ENTRE OTROS R5 ES H, -OH, -CHO, ENTRE OTROS n ES 1-4 A ES UN GRUPO FENILO DE FORMULA (AI), DONDE R ES HALOGENO, NITRO, ENTRE OTROS, m ES 0-5. SON COMPUESTOS PREFERIDOS N-{2-[3-CLORO-5-(TRIFLUOROMETIL)PIRIDIN-2-IL]-2-METILPROPIL}-2-(TRIFLUOROMETIL)BENZAMIDA, N-{2-[3-CLORO-5-(TRIFLUOROMETIL)PIRIDIN-2-IL]-1-METOXIETIL}-2-(TRIFLUOROMETIL)BENZAMIDA, ENTRE OTROS. TAMBIEN SE REFIERE A UNA COMPOSICION FARMACEUTICA QUE ES UTIL PARA EL CONTROL DE NAMATODOS.