| Gb | Big5 | Eng | Rad | Mega | Triple | Multilingual |
|---|---|---|---|---|---|---|
Buten, Butylen (S, Chem) [ding1 xi1] 
丁烯 Cyclobuten (S, Chem) [huan2 ding1 xi1] 环丁烯 Fumarsäure (S, Chem) [fan3 ding1 xi1 er4 suan1] 反丁烯二酸 trans-Buten (S, Chem) [fan3 ding1 xi1] 反丁烯