SEARCH Articles Figures Tables 4-O-Methyltransferase Catechol Catechol (3-methyltransferase Catechol (3-methyltransferase inhibitors Catechol O-methyltransferases Catechol-o-methyltransferase (COMT inhibitor Catecholate Methyltransferase Methyltransferase Inhibitors Methyltransferases O inhibitors O-Methyltransferases O-methyltransferase Inhibitors