1-methyl-4-cyano-4-phenylpiperidine, 1-Methyl-4-phenyl-4-piperidine carbonitrile, Pethidine intermediate A, 1-Methyl-4-phenyl-piperidin-4-carbonitril, 4-Cyano-1-methyl-4-phenylpiperidine, 1-N-methyl-4-cyano-4-phenylpiperidine, 4-Piperidinecarbonitrile,1-methyl-4-phenyl, 4-cyano-4-phenyl-N-methylpiperidine, 1-methyl-4-phenyl-piperidine-4-carbonitrile, N-Methyl-4-phenylpiperidin-4-nitril