5-hydroxymethylfurfural + O2 => 2,5-diformylfuran + H2O2
5-hydroxymethylfurfural + o2 => 2,5-diformylfuran + h2o2
5-hydroxymethylfurfural + O2 => 2,5-diformylfuran + H2O2
5-hydroxymethylfurfural + o2 => 2,5-diformylfuran + h2o2