(S)-corytuberine synthase activity
Catalysis of the reaction: H+ + (S)-reticulinium(1+) + NADPH + O2 = (S)-corytuberine + NADP + 2 H2O.
GO:0016717
oxidoreductase activity, acting on paired donors, with oxidation of a pair of donors resulting in the reduction of molecular oxygen to two molecules of water
is_a