Glass an indole compound containing sulfonamide and production method thereof.

A cristalinaREI form (Form C) of N- (3-cyano-4-methyl-1H-indol-7-yl) -3 & 952; cyanobenzenesulfonamide having a diffraction peak at a diffraction angle (2 ± 0.2 °) of 11.4 ° in an X-ray diffraction powder.