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