has role is conjugate acid of tyramine monoamine molecular messenger neurotransmitter tyraminium +1 138.092 138.18700 2-(4-hydroxyphenyl)ethanaminium An ammonium ion that is the conjugate acid of tyramine; major species at pH 7.3. C8H12NO CHEBI:327995 DZGWFCGJZKJUFP-UHFFFAOYSA-O InChI=1S/C8H11NO/c9-6-5-7-1-3-8(10)4-2-7/h1-4,10H,5-6,9H2/p+1 MetaCyc:TYRAMINE [NH3+]CCc1ccc(O)cc1 chebi_ontology tyramine tyraminium cation tyraminium(1+) ammonium ion human metabolite