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