Abstract: The synthesis and spectroscopic characterization of compounds which model different forms of the active site cofactor in copper amine oxidases have been pursued. As described, 5-(2, 4, 5-trihydroxybenzyl) hydantoin (lrdH3), its corresponding quinone (loxH), and 6-amino-4-ethylresorcinol (7H2) have been prepared. Additionally, 5-(3, 4- dihydroxybenzyl) hydantoin (2, dHz) was synthesized for comparative purposes. ...