ethyl diethyl malonate
Diethyl carbonate
7-amino-6-(4-chlorobenzoyl)-5-ethylpyrazolo[1,5-a]pyrimidine-3-carbonitrile
7-(4-chlorophenyl)-5-ethylpyrazolo[1,5-a]pyrimidine-3,6-dicarbonitrile
7-amino-6-(4-bromobenzoyl)-5-ethylpyrazolo[1,5-a]pyrimidine-3-carbonitrile