5-乙酰基-6-甲基-2-氧代-1,2-二氢-3-吡啶羧胺

5-乙酰基-6-甲基-2-氧代-1,2-二羟基吡啶-3-甲腈

N-(2-乙酰基-3-氧代-1-丁烯-1-基)脲

5-乙酰基-6-甲基-2(1H)-吡啶酮

5-(4-methyl-2-methylsulfanylpyrimidin-5-yl)penta-2,4-diyn-1-ol