octopamine organic cation ammonium ion derivative octopaminium C8H12NO2 The conjugate acid of octopamine; major species at pH 7.3. 4-(2-azaniumyl-1-hydroxyethyl)phenol chebi_ontology QHGUCRYDKWKLMG-UHFFFAOYSA-O 154.18640 2-hydroxy-2-(4-hydroxyphenyl)ethanaminium CHEBI:58025 2-hydroxy-2-(4-hydroxyphenyl)ethan-1-aminium octopaminium cation octopamine octopaminium(1+) 4-(2-ammonio-1-hydroxyethyl)phenol 154.08626 InChI=1S/C8H11NO2/c9-5-8(11)6-1-3-7(10)4-2-6/h1-4,8,10-11H,5,9H2/p+1 [NH3+]CC(O)c1ccc(O)cc1 +1