5-Oxo-1-(2,4,6-trimethyl-phenyl)-pyrrolidine-3-carboxylic acid

4-Oxo-3,4-dihydro-phthalazine-1-carboxylic acid

(5,5-Dimethyl-2-oxo-tetrahydro-furan-3-yl)-acetic acid

(1,4,5,6-Tetrahydro-pyrimidin-2-ylsulfanyl)-acetic acid

2,3-Dimethyl-quinoxaline-6-carboxylic acid

2,3-二甲基喹喔啉-6-羧酸

(2,5-Dioxo-pyrrolidin-1-yl)-acetic acid

2-Morpholin-4-yl-quinoline-4-carboxylic acid

4-Amino-[1,2,5]thiadiazole-3-carboxylic acid

4-氨基-(1,2,5)-噻二唑-3-甲酸

Benzoimidazol-1-yl-acetic acid

苯并咪唑-1-乙酸

5-Methyl-4-oxo-3,4-dihydro-thieno[2,3- d ]pyrimidine-6-carboxylic acid

5-甲基-4-氧代-3,4-二氢-噻吩并[2,3-D]嘧啶-6-羧酸

1,4,5,6-Tetrahydro-cyclopentapyrazole-3-carboxylic acid

1,4,5,6-四氢-环戊烷-3-羧酸