monoamine naturally occurring monoamine chebi_ontology PMID:22153577 monoamines PMID:22005599 PMID:22371656 PMID:22342987 naturally occurring monoamines PMID:21993877 PMID:22082101 An aralylamino compound which contains one amino group connected to an aromatic ring by a two-carbon chain. Monoamines are derived from aromatic amino acids like phenylalanine, tyrosine, tryptophan, and the thyroid hormones by the action of aromatic amino acid decarboxylase enzymes. CHEBI:63534 PMID:21822758 PMID:22213370 PMID:22218931 aralkylamino compound