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