Enables the insect to feed on furanocoumarin-producing plants and evolved as an adaptation for detoxification of xanthotoxin and other furanocoumarins. an organic molecule + O2 + reduced [NADPH--hemoprotein reductase] = an alcohol + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] Midgut microsome. By xanthotoxin, a secondary metabolite abundant in the host plants of this specialized herbivore. The sequence shown is that of 6B1-1, 6B1-2 seems to differ in 9 positions and is probably an allele. Belongs to the cytochrome P450 family.