CRYSTAL FORM S4 OF THE PLK4 INHIBITOR (LR,2S)-(E)-2-(3-(4-((CIS-2,6-DIMETHYLMORPHOLINO)METHYL)STYRYL)- 1 H-IMIDAZOL-6- YL)-5'-METHOXYSPIROCYCLOPROPANE-L,3'-INDOLIN-2'-ONE FUMARATE

摘要

Disclosed is Crystal Form S4 of a fumarate salt of compound (I) represented by the following structural formula: (I) The molar ratio between compound (I) and fumaric acid is 1.0:1:0. Crystal Form S4, 5 characterized by an X-ray powder diffraction pattern which comprises peaks at 6.6°, 9.8°, 16.3°, 21.1°, 28.7°, and 30.2° ± 0.2 in 2θ.