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