The synthetic medium of optical N acylalanines was N (2,6 xylyl) alanine.It was reacted with 1 menthol and prepared into its menthol esters which were purified by TLC, resolved and determined by HPLC.

光学活性杀菌剂合成中间体N-（2，6-二甲基）-丙氨酸与l-薄荷醇在催化剂作用下，生成非对映异构体薄荷醇酯。

A survey of the health condition of 308 cases of workers exposed to benzene, toluene, xylol and mixed derivatives of benzene is presented.

本文报告308、甲、二甲及混合作业人健康状况调查结果。

Recent method of synthesizing 3,5-xylenol is sulpho alkaline fusion of dimethylbenzene,it is a very complicated procedure with serious pollution and low-pure products.

国内目前生是间二甲磺化碱熔法,该方法过程复杂、污染严重,并且品纯度不高。

Paraxylene is a petrochemical used to make purified terephthalic acid, a raw material for producing polyester film, packaging resin and fabrics.

二甲是一种石化品，用来制造精对二甲酸，原料生聚酯薄膜，包装树脂和织物。

METHOD The chorditis vocalis in rabbits were caused with croton oil and the ear swell ing in mice with dimethylbenzene.

方法采用巴豆油引起家兔声带炎症模型和二甲引起小鼠耳炎症模型,观察CPI局部涂抹给药抗炎作用。