ethyl 4-(4-chloro-2-fluorophenyl)-4-hydroxybut-2-ynoate

ethyl (Z)-4-oxo-4-phenyl-2-[(E)-(4-phenyl-1H-1,2,4-triazol-5-ylidene)methyl]but-2-enoate

ethyl 2-(acetyloxymethyl)prop-2-enoate

ethyl 3-morpholin-4-ylprop-2-enoate

(9CI)-1-(1-氧代-2-丙炔)-吡咯烷