1-(tert-butyl)-5-amino-pyrazole-4-carboxylic acid ethyl ester
ethyl 2-cyano-3-(2-ethylaminopyrazolo<1,5-a>pyridin-3-yl)acrylate
5-(4-fluorophenyl)-7-trifluoromethylpyrazolo[1,5-a]pyrimidine-3-carboxylic acid ethyl ester
ethyl 5-amino-1H-pyrazole-4-carboxylate
2-phenyl-2,3-dihydro-1H-imidazo[1,2-b]pyrazole-7-carboxylic acid ethyl ester