3-(5-硝基-2H-吡唑-3-基)吡啶

甲酸

3-(1-hydroxy-1-methylpyrrolidin-1-ium-5-id-2-yl)pyridine

3-(1-甲基吡咯烷-2-基)-1-氧代吡啶-1-鎓

吡咯