5-甲基-3-吡唑甲酸

2-甲基苯并咪唑

3,6-dimethyl-2-methylsulfanylpyrimidin-4-one

6-甲基-2-苯基嘧啶-4-酮

3-methyl-5-(trichloromethyl)-4H-1,2-oxazol-5-ol