The invention relates to N-3-[3-(dimethylamino)-1-oxo-2-propenyl]phenyl}-N-ethylacetamide hydrochloride of formula (II) having a purity of more than 99.5% and a process for its preparation.
本发明涉及纯度大于 99.5%的式 (II) 的 N-3-[3-(二甲基
氨基)-1-氧代-2-
丙烯基]苯基}-N-乙基乙酰胺盐酸盐及其制备方法。