3-(4-甲氧基苯甲酰基)丙酸

1,4-二(4-甲氧基苯基)-1,4-丁烷二酮

4,4-bis(4-methoxyphenyl)-4-butyrolactone

3-(4-氯苯甲酰)丙酸

4,4-bis(4-chlorophenyl)-4-butyrolactone