is conjugate acid of has functional parent methylated tertiary amine trimethylamine N-oxide hydroxytrimethylaminium chebi_ontology A methylated tertiary amine that is trimethylammonium in which the hydrogen attached to the nitrogen is replaced by a hydroxy group. (CH3)3NOH hydroxy(trimethyl)azanium CHEBI:166856 hydroxytrimethylazanium organic hydroxy compound trimethylammonium