EP3856714A1 - CRYSTALLINE FORMS OF N-(1 -((2-(DIMETHYLAMINO)ETHYL)AMINO)-2-M ETHYL-1 -OOPROPAN-2-YL)-4-(4-(2-METHYL-5- (2S,3R,4R,5S,6R)-3,4,5-TRIHYDROXY-6-(METHYLTHIO)TETRAHYDRO-2H-PYRAN-2-YL)BENZYL) PHENL)BUTANAMIDE AND METHODS OF THEIR SYNTHESIS