2-(甲基氨基)乙酸乙酯

(2S,4S)-6-氟-2，3-二氢-2’,5’-二氧螺(4H-1-苯并吡喃-4,4’-咪唑烷)-2-羧酸

2-(2-ethoxyphenyl)-2-hydroxy-1-phenylethanone

5-(cyclohex-2-en-1-ylmethyl)imidazolidine-2,4-dione