vanillin + H2O2 => 4-hydroxy-3-methoxy-benzenemethanol + O2
vanillin + h2o2 => 4-hydroxy-3-methoxy-benzenemethanol + o2
vanillin + H2O2 => 4-hydroxy-3-methoxy-benzenemethanol + O2
vanillin + h2o2 => 4-hydroxy-3-methoxy-benzenemethanol + o2