Pipecolic Acid-d9(±)-Pipecolic Acid-d9Dihydrobaikiane-d9Hexahydro-2-picolinic AcidPipecolinic Acid-d92-Pipecolinic Acid-d9DL-2-Piperidinecarboxylic Acid-d9DL-Pipecolic Acid-d9Piperolinic Acid-d9(±)-2-Piperidinecarboxylic Acid-d92-Carboxypiperidine-d9NSC 17125-d9α-Pipecolinic Acid-d9DL-Pipecolic Acid-d92-Piperidine-2,3,3,4,4,5,5,6,6-d9-carboxylic Acid2-Piperidinecarboxylic Acid-d9(RS)-2-Piperidinecarboxylic Acid-d92-Piperidinylcarboxylic Acid-d9-d9 Homoproline-d9Piperidine-6-carboxylic Acid-d9