2-but-2-enylsulfanylpyridine

N-but-3-en-2-yl-2,2,2-trichloroacetamide

3-(4-碘苯基)-1-丁醇

but-2-en-1-ol,4-nitrobenzoic acid

3,4-bis(but-2-enoxy)cyclobut-3-ene-1,2-dione