嘧啶环 meaning in English
pyrimidine ring
Examples
- Purine a simple nitrogenous organic molecule with a double - ring structure ? a 6 - membered pyrimidine ring fused to a 5 - membered imidazole ring
嘌呤：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。
pyrimidine ring