acetic acid,4-[tert-butyl(dimethyl)silyl]oxybut-2-en-1-ol

4-(2,2,2-trichloroethanimidoyl)oxybut-2-enyl acetate

4-acetyloxybut-2-enyl but-2-ynoate

(Z)-4-chlorobut-2-en-1-yl acetate

二苯基环丙烯酮