preferred_name: minocycline(in) + H(+)(out) = minocycline(out) + H(+)(in)
preferred_name_lc: minocycline(in) + h(+)(out) = minocycline(out) + h(+)(in)
label: minocycline(in) + H(+)(out) = minocycline(out) + H(+)(in)
label_lc: minocycline(in) + h(+)(out) = minocycline(out) + h(+)(in)