2,3-Piperidine dicarboxylate 2,3-Piperidinedicarboxylic acid 2,3-Piperidinedicarboxylic acid, (2R,3S)-rel- 2,3-Piperidinedicarboxylic acid, cis- 46026-75-9 cis-2,3-Piperidine dicarboxylic acid