cancerogenic

The title resin has been prepared by Friedel-Crafts acylation followed by bromination and amination.The method avoids the utilization of cancerogenic chloromethyl methyl ether.

通过付氏酰基化反应引入乙酰基，接着溴化、胺化，得树脂。该法避免了使用氯甲醚。

Indicate epidemiology investigation , confirm on the grounds of international sampling investigation, major part in the cancerogenic patient who has a smoke is a passive smoker.

流行病学调查表明，据际性的抽样调查证实，烟致癌患者中的大部分是烟者。