title: Letter: Determination of 3-methoxytyramine, normetanephrine and metanephrine in human plasma by gas chromatography.
mesh_terms: D002849:Chromatography, Gas; D004837:Epinephrine / Q000031:analogs & derivatives* / Q000097:blood; D006801:Humans; D008738:Methyl Ethers / Q000097:blood; D009647:Normetanephrine / Q000097:blood*; D014439:Tyramine / Q000097:blood*
chemical_list: D008738:Methyl Ethers; D009647:Normetanephrine; D014439:Tyramine; D004837:Epinephrine