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