3- tert -Butoxycarbonylamino-3-(3,4-dimethoxy-phenyl)-propionic acid

1,3-Dimethyl-6-(1,3,5-trimethyl-1 H -pyrazol-4-yl)-1 H -pyrazolo[3,4- b ]pyridine-4-carboxylic acid

2-Carboxymethyl-5-nitro-2 H -pyrazole-3-carboxylic acid

4-(5-Methyl-3-nitro-pyrazol-1-yl)-butyric acid

1,3,6-Trimethyl-1 H -pyrazolo[3,4- b ]pyridine-4-carboxylic acid

1-(1,5-Dimethyl-1 H -pyrazole-4-sulfonyl)-piperidine-4-carboxylic acid

1-[(1-Ethyl-1H-pyrazol-4-yl)sulfonyl]piperidine-4-carboxylic acid

5-(3,4-Dimethoxy-phenyl)-isoxazole-3-carboxylic acid

5-(3,4(3,4-二甲氧基苯基)异恶唑-唑3羧酸

1-(3-Nitro-benzenesulfonyl)-piperidine-3-carboxylic acid

5-(1-Ethyl-5-methyl-1 H -pyrazol-4-yl)-isoxazole-3-carboxylic acid

2-Ethyl-5-trifluoromethyl-2 H -pyrazole-3-carboxylic acid