Keywords: Isonipecotic-acid-3D-balls.png Ball-and-stick model of the isonipecotic acid molecule a heterocyclic compound consisting of a piperidine ring with a carboxylic acid group Derived from File Piperidine-3D-balls-B png and File Oxalic-acid-3D-balls-B png 2010-07-27 Jynto and Ben Mills Gamma-amino acids Piperidines Images by Jynto |