diimine

例句：

1. 1. The compound contains two nitrogen atoms and one carbon atom.
   这个化合物含有两个氮原子和一个碳原子。
2. 2.This substance is used as a base for dyes and pigments.
   这种物质用作染料和颜料的碱基。
3. 3. Diamines are important intermediates in the synthesis of many organic compounds.
   二胺是合成许多有机化合物的重要中间体。