Main Reaction: biopterin + O2 >> 6-formylpterin + H2O2

Reference: PubMed ID: 20135037
Authors: Vignoni M, Cabrerizo FM, Lorente C, Claparols C, Oliveros E, Thomas AH
Title: Photochemistry of dihydrobiopterin in aqueous solution.
Published: 2010 Feb 21

biopterin + O2 --> 6-formylpterin + H2O2