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