medium-ring compounds 中环化合物
6 ring compounds 六环化合物
four-ring compounds 四元环类化合物
fused ring compounds 稠环化合物
three-ring compounds 三元环化合物
indole ring compounds 吲哚环化合物
double ring compounds 双环化合物
Hexatomic ring compounds 六元环化合物
cyclobutane ring compounds 四元环类化合物
The contents of 5～6 ring compounds were small in both samples.
总体上看，大气样品和叶片样都以3～4环化合物为主，5～6环化合物较少。
参考来源 - 广州白云山风景区阔叶植物叶片中的多环芳烃·2,447,543篇论文数据，部分数据来源于NoteExpress
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。
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