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METHODS Bretazenil was synthesized from 3-bromoaniline by cyclization, oxidation and ring-enlargement reaction, etc. 方法以3-溴苯胺爲(wèi)起始原料，經(jīng)過成環(huán)、氧化、擴環(huán)等反應(yīng)得到目標(biāo)産物。 www.zgyxzz.com.cn