butene,2-butene

ω-[tris(2-hydroxyethyl)ammonio]poly[(dimethyliminio)-2-butene-1
4-溴-1-丁烯
1-chloro-4-acetoxy-2-methyl-2-butene
4-p-chlorophenyl-1-butene
66711-86-2 (trans-1,1,1,4,4,4-hexafluoro-2-butene)