preferred_name: L-cystine-bis-glycine + 2 H2O => L-cystine + 2 glycine
preferred_name_lc: l-cystine-bis-glycine + 2 h2o => l-cystine + 2 glycine
label: L-cystine-bis-glycine + 2 H2O => L-cystine + 2 glycine
label_lc: l-cystine-bis-glycine + 2 h2o => l-cystine + 2 glycine