6-甲基-2-氧代-2H-色烯-5-羧酸甲酯

ethyl 3-(2-fluoro-4-methoxyphenyl)prop-2-enoate

2-(4-甲基四氢-2H-吡喃-4-基)乙酸

ethyl 5-[5-(5-ethoxy-5-oxopent-3-enyl)-3-methyl-1,2-oxazol-4-yl]pent-2-enoate

4-(2-phenylethenyl)chromen-2-one