Refers to the compound (2S) - 3 - [(3S, 4S) - 3 - [(1R) - 1-hydroxyethyl] - 4 - (4 - methoxy - 3 - [1 - (5 - metilpiridin - 2 - il) azetidin - 3 - il] oxy] phenyl) - 3 - metilpirrolidin - triazin-1-yl] - 3 - oxopropano - 1,2-diol Crystalline Powder diffraction Pattern, whose Angle x-ray 2theta has the following: 18.5\u00b0 Peaks, 16.2\u00b0, 20.2\u00b0 And 14.4\u00b0 (0.2\u00b0. It also relates to a Pharmaceutical composition.This Compound is an inhibitor of phosphodiesterase 4 (PDE4) is useful in the treatment of overactive bladderSE REFIERE AL COMPUESTO (2S)-3-[(3S,4S)-3-[(1R)-1-HIDROXIETIL]-4-(4-METOXI-3-{[1-(5-METILPIRIDIN-2-IL)AZETIDIN-3-IL]OXI}FENIL)-3-METILPIRROLIDIN-1-IL]-3-OXOPROPANO-1,2-DIOL CRISTALINO, CUYO PATRON DE DIFRACCION EN POLVO DE RAYOS X EN ANGULO 2THETA TIENE LOS SIGUIENTES PICOS: 18.5°, 16.2°, 20.2° Y 14.4° ± 0.2°. TAMBIEN SE REFIERE A UNA COMPOSICION FARMACEUTICA. DICHO COMPUESTO ES INHIBIDOR DE FOSFODIESTERASA 4 (PDE4) SIENDO UTIL EN EL TRATAMIENTO DE VEJIGA HIPERACTIVA