eight member ring heterocyclic compound [有化] 八元杂环化合物
four member ring heterocyclic compound [有化] 四元杂环化合物
FIVE MEMBER RING HETEROCYCLIC COMPOUNDS 五员杂环化合物
member-ring 元环
six-member-ring 六元环
four-member ring 四元环
five member ring 五元环的
four member ring 四元环
member ring systems 多环体系
The three-member ring structure transition region and structure transition state were found out.
得到了各反应通道的结构过渡区和结构过渡态。
The result shows that the transition state of the rearrangement reaction is a three-member ring structure external the molecular plane.
结果发现，该重排反应经过一个面外三元环过渡态。
It is show that the complexes of galloyl type hydrolysable tannins with aluminum are formed which involve five-member ring stably formed adjacent hydroxyl groups in galloyl to aluminum atoms.
研究表明，棓酰类多元酚可与铝形成络合物，其络合物是铝和棓酰基中苯三酚的邻位二羟基形成的，它是稳定的五员螯合环结构；
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