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