Mesylate D crystal form of nicotinamide derivatives and preparation method and application thereof

The invention discloses a mesylate D crystal form of nicotinamide derivatives and a preparation method and an application thereof. The XRPD atlas of the mesylate D crystal form of nicotinamide derivatives has diffraction peaks at sites of 2 theta being equal to 6.16, 10.441, 12.241, 12.774, 13.342, 14.498, 15.7, 16.66, 18.441, 19.463, 20.179, 20.559, 21.198, 22.219, 23, 23.558, 24.419, 25.4, 25.858, 27.219, 27.738, 28.354, 29.161, 31.58, and the error range of the value of 2 theta is 0.2. The mesylate D crystal form of nicotinamide derivatives provided by the invention has good light stability, and the research on the crystal form has important significance on the further research of the curative effect of solid drugs of the mesylate of nicotinamide derivatives.