4-Carboxypiperidine 4-Hexahydroisonicotinic acid 4-Piperidinecarboxylic acid 498-94-2 5-22-01-00244 (Beilstein Handbook Reference) Acide isonipecotique [French] Acide piperidine-carboxylique-4 [French] BRN 0112553 EINECS 207-872-3 Hexahydroisonicotinic acid Isonicotinic acid, hexahydro- Isonipecotic acid NSC 61049 Piperidine-4-carboxylic acid