PROCESS FOR PREPARING POLYMORPH OF 7-CHLORO-N, N,5-TRIMETHYL-4-OXO-3-PHENYL-3,5-DIHYDR0-4H-PYRIDAZIN0[4,5-B]INDOLE-1-ACETAMIDE

摘要

Disclosed is a novel process for preparing crystalline Form II of 7-chloro-N,N,5-trimethyl-4-oxo-3-phenyl-3,5-dihydro-4H-pyridazino[4,5-b]indole-1-acetamide.