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