preferred_name: melibiose(out) + Li(+)(out) => melibiose(in) + Li(+)(in)
preferred_name_lc: melibiose(out) + li(+)(out) => melibiose(in) + li(+)(in)
label: melibiose(out) + Li(+)(out) => melibiose(in) + Li(+)(in)
label_lc: melibiose(out) + li(+)(out) => melibiose(in) + li(+)(in)