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
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
four-member-ring compound 四元环类化合物
nine member ring heterocyclic compound [有化] 九元杂环化合物
应用推荐