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对氯苯酚与苯酚反应生成４苯氧基苯酚，后者与２氯乙基氨基甲酸乙酯反应生成双氧威，原药纯度达９５％。
Chlorophenol and phenol reaction 4-phenoxyphenol, the latter with 2-chloroethyl ethyl carbamate reaction of two oxygen, the original drug purity of 95%.