| abstract |
A crystal of a specific oxazole compound having a specific inhibitory effect on PDE4 and having excellent stability is provided. Specifically, it is a crystal of an oxazole compound represented by the formula (5) :, and in a powder X-ray diffraction pattern measured by CuKα characteristic X-ray, a diffraction angle 2θ (°) = 9.6 ± 0. Crystals with peaks at 2, 19.1 ± 0.2, and 21.2 ± 0.2 are provided. [Selection diagram] None |