(5-Bromo-2,3-dioxo-2,3-dihydro-indol-1-yl)-acetic acid ethyl ester

4-Benzothiazol-2-yl-benzoic acid methyl ester

4-(3-Bromo-phenyl)-2-oxo-2,3-dihydro-thiazole-5-carboxylic acid ethyl ester

4-(1-Methyl-1 H -pyrazol-4-yl)-2,4-dioxo-butyric acid methyl ester

2-Cyclopropylamino-4-methyl-thiazole-5-carboxylic acid ethyl ester

7-Cyclopropyl-pyrazolo[1,5- a ]pyrimidine-2-carboxylic acid methyl ester

7-Chloromethyl-5-oxo-4,5-dihydro-pyrazolo[1,5- a ]pyrimidine-3-carboxylic acid ethyl ester

(2-Methyl-4-nitro-imidazol-1-yl)-acetic acid ethyl ester

(3-Trifluoromethyl-pyrazol-1-yl)-acetic acid ethyl ester

1-(1-Methyl-1 H -pyrazole-4-sulfonyl)-piperidine-3-carboxylic acid ethyl ester

5-Methyl-7-trifluoromethyl-pyrazolo[1,5- a ]pyrimidine-3-carboxylic acid ethyl ester