1-(4-硝基苯基)-3-羟基哌啶

1-methylsulfonylpiperidin-3-ol

3-羟基-N-亚硝基哌啶

3-羟基-alpha-(5-苯基-3-异恶唑基)-1-哌啶乙醇

3,4-二氢-2H-吡咯