METHODS Terazosin hydrochloride was synthesized from anhydro-piperazine via acylation,reduction,amination,salification etc.

方法以无水哌嗪为起始原料,经、原、胺、成盐反应制得盐唑嗪。

METHODS Balsalazide disodium was synthesized by reactions of condensation , reduction, diazotization , coupling and salification from 4-nitrobenzoyl chloride.

方法以对硝基苯甲氯为起始原料,经缩合、原、重氮、偶合、成盐反应制得巴柳氮二钠。