有机化合物种类繁多,数目庞大,即使同一分子式,也有不同的异 构体,若没有一个完整的命名(nomenclature)方法来区分各个化 合物,在文献中会造成极大的混乱,因此认真学习每一类化合物的 命名是有机化学的一项重要内容。现在书籍、期刊中经常使用普通 命名法和国际纯粹与应用化学联合会(International Union of Pure and Applied Chemistry)命名法,后者简称IUPAC命名法
A ring that contains at least one heteroatom (an atom other than carbon) is called a heterocycle, and a substance based on a heterocyclic ring is a heterocyclic compound. Heterocyclic compounds containing N, O or S are by far the most common