Azacyclonol Isonicotinic Acid Isonicotinic Acid Ethyl Ester Isonicotinic Acid Methyl Ester Isonipecotic Acid Isonipecotic Acid Ethyl Ester Nipecotic Acid Ethyl Ester N-Benzylpiperidine-4-carboxaldehyde Nipecotic Acid Methyl Ester Magnesium Metal Turnings