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4-((1R,2R)-(2-cyanoacetamido)cyclohexylamino)pyrrolo[1,2-b]pyridazine-3-carboxamide
4-((1R,2R)-2-aminocyclohexylamino)pyrrolo[1,2-b]pyridazine-3-carboxamide
tert-butyl (1R,2R)-2-(3-carbamoylpyrrolo[1,2-b]pyridazin-4-ylamino)cyclohexylcarbamate
tert-butyl (1R,2R)-2-(3-cyanopyrrolo[1,2-b]pyridazin-4-ylamino)cyclohexylcarbamate
4-((1S,2R)-2-methylcyclohexylamino)pyrrolo[1,2-b]pyridazine-3-carbonitrile