3-methylxanthine + NADH + O2 + H(+) <=> xanthine + formaldehyde + NAD(+) + H2O
3-methylxanthine + nadh + o2 + h(+) <=> xanthine + formaldehyde + nad(+) + h2o
3-methylxanthine + NADH + O2 + H(+) <=> xanthine + formaldehyde + NAD(+) + H2O
3-methylxanthine + nadh + o2 + h(+) <=> xanthine + formaldehyde + nad(+) + h2o