1-[(4-氟苯基)甲基]-2,5-吡咯烷二酮

(E)-4-(4-hydroxyphenyl)-4-oxobut-2-enoic acid

2-[(5s)-2,4-二氧代噻唑烷-5-基]乙酸酯

4-[4-(4-methylphenoxy)phenyl]-4-oxobut-2-enoic acid

4-oxo-4-[4-(4-propan-2-ylphenoxy)phenyl]but-2-enoic acid