(2S)-piperidine-2-carboxylic acid (2S)-2-piperidinecarboxylic acid (2S)-pipecolinic acid CHEBI:46876 L-pipecolate ester L-pipecolate esters CPI (S)-(-)-pipecolic acid (S)-pipecolic acid 2-Piperidinecarboxylic acid C00408 SBB006732 Pipecolinic acid L-(-)-pipecolic acid Pipecolic acid (S)-(−)-2-Piperidinecarboxylic acid L-Homoproline P2519_SIGMA (S)-piperidine-2-carboxylic acid CHEBI:30913 6-CARBOXYPIPERIDINE (2S)-piperidin-1-ium-2-carboxylate (2S)-2-piperidin-1-iumcarboxylate ZINC00157015