preferred_name: sucrose(out) + H(+)(in) <=> sucrose(in) + H(+)(out)
preferred_name_lc: sucrose(out) + h(+)(in) <=> sucrose(in) + h(+)(out)
label: sucrose(out) + H(+)(in) <=> sucrose(in) + H(+)(out)
label_lc: sucrose(out) + h(+)(in) <=> sucrose(in) + h(+)(out)