This enzyme belongs to the family of oxidoreductases, specifically those acting on paired donors, with O2 as oxidant and incorporation or reduction of oxygen. The oxygen incorporated need not be derived from O2 with NADH or NADPH as one donor, and incorporation of one atom o oxygen into the other donor. The systematic name of this enzyme class is senecionine,NADPH:oxygen oxidoreductase (N-oxide-forming). Other names in common use include senecionine monooxygenase (N-oxide-forming) and SNO.
References
Lindigkeit R, Biller A, Buch M, Schiebel HM, Boppre M, Hartmann T (1997). "The two facies of pyrrolizidine alkaloids: the role of the tertiary amine and its N-oxide in chemical defense of insects with acquired plant alkaloids". Eur. J. Biochem. 245 (3): 626–36. doi:10.1111/j.1432-1033.1997.00626.x. PMID9182998.