preferred_name: L-leucine + a fatty acid => an N-(fatty acyl)-L-leucine + H2O
preferred_name_lc: l-leucine + a fatty acid => an n-(fatty acyl)-l-leucine + h2o
label: L-leucine + a fatty acid => an N-(fatty acyl)-L-leucine + H2O
label_lc: l-leucine + a fatty acid => an n-(fatty acyl)-l-leucine + h2o