acetaldehyde + sulfite + H(+) => 2-sulfinoacetaldehyde + H2O
acetaldehyde + sulfite + h(+) => 2-sulfinoacetaldehyde + h2o
acetaldehyde + sulfite + H(+) => 2-sulfinoacetaldehyde + H2O
acetaldehyde + sulfite + h(+) => 2-sulfinoacetaldehyde + h2o