label: xanthotoxin + reduced [NADPH--hemoprotein reductase] + O2 => 5-hydroxyxanthotoxin + oxidized [NADPH--hemoprotein reductase] + H2O + 2 H(+)
label_lc: xanthotoxin + reduced [nadph--hemoprotein reductase] + o2 => 5-hydroxyxanthotoxin + oxidized [nadph--hemoprotein reductase] + h2o + 2 h(+)