preferred_name: 2-oxobutanoate + L-cysteine <=> 2-oxo-3-sulfanylpropanoate + (2S)-2-aminobutanoate
preferred_name_lc: 2-oxobutanoate + l-cysteine <=> 2-oxo-3-sulfanylpropanoate + (2s)-2-aminobutanoate
label: 2-oxobutanoate + L-cysteine <=> 2-oxo-3-sulfanylpropanoate + (2S)-2-aminobutanoate
label_lc: 2-oxobutanoate + l-cysteine <=> 2-oxo-3-sulfanylpropanoate + (2s)-2-aminobutanoate