- 
 
ethyl 5-chloropyrazolo[1,5-a]pyrimidine-3-carboxylate
 - 
 
Ethyl 4-formylpyrrole-2-carboxylate
 - 
 
ethyl 3-amino-5-methyl-1H-pyrrole-2-carboxylate
 - 
 
ethyl (3,5-dibromopyrazin-2-yl)glycinate
 - 
 
benzyl 4,6-dihydropyrrolo[3,4-c]pyrazole-5(1H)-carboxylate
 - 
 
benzyl (S)-2-(((3-chloropyrazin-2-yl)methyl)carbamoyl)pyrrolidine-1-carboxylate
 
