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(2007/10/02)6-hydrazino-9,9-dimethyl-2-phenyl-9H-imidazo<1,2-b>pyrazolo<4,3-d>pyridazine benzaldehyde hydrazone
6-hydrazino-9,9-dimethyl-2-phenyl-9H-imidazo<1,2-b>pyrazolo<4,3-d>pyridazine acetone hydrazone
9,9-dimethyl-2-phenyl-9H-imidazo<1,2-b>pyrazolo<4,3-d>pyridazine hydrochloride
6-hydrazino-9,9-dimethyl-2-phenyl-9H-imidazo<1,2-b>pyrazolo<4,3-d>pyridazine
3-bromo-6-chloro-9,9-dimethyl-2-phenyl-9H-imidazo<1,2-b>pyrazolo<4,3-d>pyridazine