ethyl 1-acetyl-2-ethenylcyclopropane-1-carboxylate

2-ethenyl-2,3-dihydro-1-benzofuran

(E)-(4-bromo-but-2-enyloxy)-benzene

(E)-1,4-diphenoxybut-2-ene

1,4-二乙酰氧基-2-丁烯