Ref:KUHN Synthese des 9 Methyl iso alloxazins SNBWZC29
De Commission Historique
Weygand, Friedrich;Kuhn, Richard. "Synthese des 9-Methyl-iso-alloxazins." Berichte der deutschen chemischen Gesellschaft (A and B Series) 67 (1934) : 1409-1413.
http://chemistry.europe.onlinelibrary.wiley.com/doi/10.1002/cber.19340670824
