4-氯-7-羟基-3-甲基-2,3-二氢茚-1-酮

4-hydroxy-N-(2-hydroxyethyl)butanamide

(3E)-3-(furan-2-ylmethylidene)oxolan-2-one

trimethylsilyl 4-iodobutanoate

4-(苯并噻唑-2-磺酰基)-丁酸