1,1-二氰基-2-甲氧基-4-二甲基氨基-1,3-丁二烯

4-methoxy-1-methylpyridin-2-one

2,4-二羟基吡啶

6-chloro-4-methoxy-1-methyl-2-oxopyridine-3-carbonitrile

3-氰基-4-甲氧基吡啶