6-methyl-4-oxopyrido[1,2-a]pyrimidine-3-carbonitrile

tert-butyl N-(5-chloro-6-methylpyridin-2-yl)carbamate

3-溴-5-甲基咪唑并[1,2-A]吡啶

1-methyl-3-(6-methylpyridin-2-yl)thiourea

2,3-二氨基-5-溴-6-甲基吡啶