1. Twelve derivates of S-tetrazine including three of 1,6-dihydro-S-tetrazines prepared recently were screened by pesticide activity.
   对12个S四嗪衍生物,包括3个新合成的1,6二氢S四嗪衍生物,除草、杀菌、杀虫活性进行筛选。
2. This paper reviews the research and development of phosgene Derivates,including diphenyl ketone,chlorocarbonate,isocya-nate,acyl chloride and carbonates.
   本文综述了光气下游精细化学品的开发及生产进展,包括二苯甲酮类、氯代甲酯类、异氰酸酯类、酰氯类、碳酸酯类化合物。
3. This article describes property, production and comprehensive manufacturing status of methyl chlorsilane, and the application and market status of derivate.
   叙述了甲基氯硅烷的性质,生产及综合加工简况,并简介其衍生品的应用及市场状况。

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