3627-45-0 4-Phenylpiperidine-4-carboxylic acid 4-Piperidinecarboxylic acid, 4-phenyl- 5-22-02-00464 (Beilstein Handbook Reference) BRN 0171176 EINECS 222-844-0 ISONIPECOTIC ACID, 4-PHENYL- N-Demthylmeperidinic acid Normeperidinic acid Norpethidinic acid