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