2-aminobut-2-enoate => 1-aminocyclopropane-1-carboxylate
2-aminobut-2-enoate => 1-aminocyclopropane-1-carboxylate
2-aminobut-2-enoate => 1-aminocyclopropane-1-carboxylate
2-aminobut-2-enoate => 1-aminocyclopropane-1-carboxylate