Purine a simple nitrogenous organic molecule with a double-ring structure? A 6-membered pyrimidinering fused to a 5-membered imidazole ring.
一种简单的含氮有机分子,具一个双环结构——六元嘧啶环融合成一个五元咪唑环。
2
To substitute the ring a of the aurones with pyrimidine, a series of aza aurones were synthesized.
以嘧啶环替换噢中的A环,合成了一系列氮杂噢类化合物。
3
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.