preferred_name: methylarsonous acid + AH2 + O2 = arsenite + methanol + A + H(+)
preferred_name_lc: methylarsonous acid + ah2 + o2 = arsenite + methanol + a + h(+)
label: methylarsonous acid + AH2 + O2 = arsenite + methanol + A + H(+)
label_lc: methylarsonous acid + ah2 + o2 = arsenite + methanol + a + h(+)