... lactone ring five membered 五元内酯环 member unsaturated lactone ring 五元不饱和内酯环 large ring lactone 大环内酯 ...
基于12个网页-相关网页
... four-membered ring 四元环；四原子环 lactone ring five membered 五节内酯环 many-membered ring compound 多员环化合物 ...
基于4个网页-相关网页
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