3-[(p-toluenesulfonyl)oxy]phthalide

1-methoxycarbonyl-4-methylpent-3-enylidene(triphenyl)phosphorane

1-溴-3-甲基-2-丁烯

(E)-2-((6,6-dimethyl-2-oxodihydro-2H-pyran-3(4H)-ylidene)methyl)benzoic acid

2-(2-(methoxycarbonyl)-5-methylhexa-1,4-dien-1-yl)benzoic acid