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