preferred_name: 2 L-cysteine <=> S-sulfanyl-L-cysteine + L-alanine
preferred_name_lc: 2 l-cysteine <=> s-sulfanyl-l-cysteine + l-alanine
label: 2 L-cysteine <=> S-sulfanyl-L-cysteine + L-alanine
label_lc: 2 l-cysteine <=> s-sulfanyl-l-cysteine + l-alanine