Thomas H, Veser J, Müller-Enoch D
Hoppe Seylers Z Physiol Chem. 1976 Dec;357(10):1347-51.
A method for the determination of catechol-methyltransferase activity is described, based on the measurement of fluorometric intensity of 7-hydroxy-6-methoxycoumarin (scopoletin), enzymatically produced by dihydroxycoumarin in the presence of the methyl donor S-adenosylmethionine.