pyrimidine

詳細解釋：

py.rim.i.dine

n.（名詞）
A crystalline organic base, C4H 4N 2, that is the parent substance of various biologically important derivatives.
嘧啶：一種晶狀生物鹼，C4H 4N 2，是多種生物性地重要衍生物的親本物質
Any of several basic compounds derived from or structurally related to pyrimidine, especially the nucleic acid constituents uracil, cytosine, and thymine.
嘧啶類：由嘧啶衍生出來或在結構上與嘧啶有關的一種基本混合物尤指核酸組成的尿嘧啶，胞嘧啶和胸腺嘧啶

來源：
Alteration of pyridine
pyridine的變化