O,N-dimethyl-N-(2-n-propylamino-6-prop-2-ynylaminopyrimidin-4-yl)hydroxylamine   、                                                                                      hydrochloric acid diethyl ether   、                                                                                      
O,N-dimethyl-N-(6-n-propylamino-2-prop-2-ynylamino-pyrimidin-4-yl)hydroxylamine hydrochloride                                                                                                                                                                                                                                                                                                          以to yield O,N-dimethyl-N-(2-n-propylamino-6-prop-2-ynylamino-pyrimidin-4-yl)-hydroxylamine hydrochloride (51a)的产率得到O,N-dimethyl-N-(2-n-propylamino-6-prop-2-ynylaminopyrimidin-4-yl)hydroxylamine hydrochloride