1 QOS 3,5-dimethylpyrazin-2(1h)-one 1.000 2 A1U 3,5-dimethylpyrazin-2-ol 1.000 3 XJJ Piperazin-2-one 0.778 4 LA7 2-(hydroxymethyl)-6-methylpyridin-3-ol 0.727 5 25R 2,5-dimethylpyrazine 0.700 6 D4V 3-methylpyridin-2-ol 0.700