Benzene includes a six carbon atoms and six hydrogen atoms (C6H6), a porcine insulin molecule containing hundreds of atoms, the formula of C255H380O78N65S6.

• 一个苯分子包含六个碳原子和六个氢原子(C6H6)，一个猪胰岛素分子包含几百个原子，其分子式为C255H380O78N65S6。