对位 (苯)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/5/52/Para-Xylol_-_para-xylene.svg/220px-Para-Xylol_-_para-xylene.svg.png)
例子
对二甲苯、对-氯硝基苯、对-硝基甲苯、对-溴酚
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对二甲苯、对-氯硝基苯、对-硝基甲苯、对-溴酚
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