preferred_name: L,L-cystathionine => 2-aminobut-2-enoate + L-cysteine
preferred_name_lc: l,l-cystathionine => 2-aminobut-2-enoate + l-cysteine
label: L,L-cystathionine => 2-aminobut-2-enoate + L-cysteine
label_lc: l,l-cystathionine => 2-aminobut-2-enoate + l-cysteine