ethanol + sulfite + A + H(+) => 2-hydroxyethane-1-sulfonate + AH2
ethanol + sulfite + a + h(+) => 2-hydroxyethane-1-sulfonate + ah2
ethanol + sulfite + A + H(+) => 2-hydroxyethane-1-sulfonate + AH2
ethanol + sulfite + a + h(+) => 2-hydroxyethane-1-sulfonate + ah2