Triazine is a type of heterocyclic organic compounds, it is important to ringnitrogen organic chemical raw materials.
是一种三嗪类含氮杂环有机化合物，重要的氮杂环有机化工原料。
2
Cytosine organic compound of the pyrimidine family often called a base consisting of a single ring containing both nitrogen and carbon atoms and an amino group.
胞嘧啶：嘧啶族的有机化合物。常被称为基，包含一个单环，内有氮原子和碳原子，还有氨群。
3
This paper reviews the catalyst system in RCM reaction and RCM application in the synthesis of natural products including carbon ring, oxygen heterocycles and nitrogen heterocycles, etc.