In fused-ring and bridged-ring compounds two carbons are common to the two rings.
在稠环和桥环化合物中，两个碳原子是两个环公用的。
The key steps of hydrocracking of tetralin, the conversion of double ring compounds and the yields of mono-ring compounds were affected by the reaction temperature and the acidity of two catalysts.
四氢萘加氢裂化反应的关键步骤和双环化合物裂解的转化率以及单环化合物的产率与两种催化剂担体的酸性及反应温度有关。
Research progress regarding the use of PET reactions on synthesis of medium to large ring compounds and the prospects of their applications were introduced.
综述了利用分子内的光诱导电子转移反应合成中到大环化合物的进展。
This paper reviewed the classic synthetic methods and Recent Developments of Indole Ring Compounds.
本文综述了吲哚环类化合物的经典合成方法及近年来的合成上的研究进展。
Ring compounds in which one or more of the carbon atoms in the ring are replaced by an atom of another element such as nitrogen, sulfur or oxygen.
为环状构造的化合物，环中一个或多个碳原子被另一元素的一个原子（诸如氮、硫、或氧）所取代。
Ring compounds in which one or more of the carbon atoms in the ring are replaced by an atom of another element such as nitrogen, sulfur or oxygen.
为环状构造的化合物，环中一个或多个碳原子被另一元素的一个原子（诸如氮、硫、或氧）所取代。
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