3-demethylubiquinol-8 + A + H2O => 5-methoxy-2-methyl-3-(all-trans-octaprenyl)benzene-1,4-diol + AH2 + O2
3-demethylubiquinol-8 + a + h2o => 5-methoxy-2-methyl-3-(all-trans-octaprenyl)benzene-1,4-diol + ah2 + o2
3-demethylubiquinol-8 + A + H2O => 5-methoxy-2-methyl-3-(all-trans-octaprenyl)benzene-1,4-diol + AH2 + O2
3-demethylubiquinol-8 + a + h2o => 5-methoxy-2-methyl-3-(all-trans-octaprenyl)benzene-1,4-diol + ah2 + o2