Melamine is an organicbase chemical most commonly found in the form of white crystals rich in nitrogen
三聚氰胺是一种有机质的化学物质，最常见于含氮丰富的白色晶体。
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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。
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Guanine: organic compound of the purine family often called a base consisting of two rings each containing both nitrogen and carbon atoms and an amino group.