3-(4-methylphenyl)prop-2-ynoic acid

3-(4-methylphenyl)prop-2-ynoyl chloride

乙基3-(4-甲基苯基)-2-丙炔酸酯

1-(2-bromoethynyl)-4-methylbenzene

ethyl 5-(4-methylphenyl)-3-oxo-2-triphenylphosphoranylidenepent-4-ynoate