preferred_name: malonate(out) + Na(+)(out) => malonate(in) + Na(+)(in)
preferred_name_lc: malonate(out) + na(+)(out) => malonate(in) + na(+)(in)
label: malonate(out) + Na(+)(out) => malonate(in) + Na(+)(in)
label_lc: malonate(out) + na(+)(out) => malonate(in) + na(+)(in)