NOVEL POLYMORPH 'FORM E ' OF OLANZAPINE (2-METHYL-4- (4-METHYL-1-PIPERAZINYL) -10H-THIENO 2, 3-B 1, 5 BENZODIAZEPINE) AND PREPARATION OF THE ANHYDROUS NON-SOLVATED CRYSTALLINE POLYMORPHIC 'FORM I' OF OLANZAPINE FROM THE POLYMORPHIC OLANZAPINE 'FORM E'

摘要

The invention provides an Olanzapine pseudopolymoph Form E. The invention provides methods of preparing polymorphic Olanzapine Form E employing rapid crystallization and seeding. The invention provides methods of preparing anhydrous Olanzapine Form I from the Olanzapine Form E by step-wise drying.