. "Catalysis of the reaction: S-adenosyl-L-methionine + a catechol = S-adenosyl-L-homocysteine + a guaiacol." . . . "catechol O-methyltransferase activity" . "catechol methyltransferase activity" . "catecholamine O-methyltransferase activity" . "COMT I" . "COMT II" . "MB-COMT (membrane-bound form of catechol-O-methyltransferase)" . "S-adenosyl-L-methionine:catechol O-methyltransferase activity" . "S-COMT (soluble form of catechol-O-methyltransferase)" . . .