obsolete 3-methyl-2-oxo-1,2-dihydroquinoline 6-monooxygenase activity (obsolete GO:0018653)
OBSOLETE. Catalysis of the reaction: 3-methyl-2-oxo-1,2-dihydroquinoline + O2 + 2 H+ + 2 e- = H2O + 6-hydroxy-3-methyl-2-oxo-1,2-dihydroquinoline.