7-cyclopentyl-2-(6-piperazin-1-yl-pyridazin-3-ylamino)-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylic acid dimethylamide   、                                                                                      
2-溴乙醇                                                                                                                                                                                                                                                                                                          以gave 7-cyclopentyl-2-{6-[4-(2-hydroxy-ethyl)-piperazin-1-yl]-pyridazin-3-ylamino}-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylic acid dimethylamide (14 mg, 13%)的产率得到7-cyclopentyl-2-(6-[4-(2-hydroxyethyl)piperazin-1-yl]pyridazin-3-ylamino)-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylic acid dimethylamide