ā
phonetic a, similar to 呵
-azine, see 吖嗪[a1 qin2]
ā dìng
acridine (antiseptic and disinfectant)
ā qín
-azine
heterocyclic compound containing nitrogen in their ring such as pyridine 吡啶[bi3 ding4] C5H5N, pyrazine 噠嗪|哒嗪[da1 qin2] C4H4N2 or pyrimidine 嘧啶[mi4 ding4] C4H4N2
ān ā dìng
aminoacridine or aminacrine (antiseptic and disinfectant)