4-methoxybenzoate + AH2 + O2 = 4-hydroxybenzoate + formaldehyde + A + H2O
4-methoxybenzoate + ah2 + o2 = 4-hydroxybenzoate + formaldehyde + a + h2o
"4-methoxybenzoate O-demethylase"
"4-methoxybenzoate o-demethylase"