2 3,4,5-trihydroxybenzoate + H(+) => digallate + H2O
2 3,4,5-trihydroxybenzoate + h(+) => digallate + h2o
2 3,4,5-trihydroxybenzoate + H(+) => digallate + H2O
2 3,4,5-trihydroxybenzoate + h(+) => digallate + h2o