1-methyl-3-(4-nitrophenyl)-5,6-dihydropyrazin-2(1H)-one

tert-butyl 4-methyl-2-(4-nitrophenyl)-3-oxopiperazine-1-carboxylate

tert-butyl 2-(4-aminophenyl)-4-methyl-3-oxopiperazine-l-carboxylate

tert-butyl 2-(4-(6-bromo-4-methyl-3-oxo-3,4-dihydropyrazin-2-ylamino)phenyl)-4-methyl-3-oxopiperazine-1-carboxylate

2-(tert-butyl)-5-[2-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]-4H-thieno[2,3-c]pyrrol-6(5H)-one