preferred_name: L-alanyl-L-histidine + H2O <=> L-histidine + L-alanine
preferred_name_lc: l-alanyl-l-histidine + h2o <=> l-histidine + l-alanine
label: L-alanyl-L-histidine + H2O <=> L-histidine + L-alanine
label_lc: l-alanyl-l-histidine + h2o <=> l-histidine + l-alanine