title: N-Trifluoroacetyl-L-prolyl amino acid n-butyl ester derivatives for the ultramicrodetermination of amino acids by mass fragmentography.
mesh_terms: D000596:Amino Acids / Q000032:analysis*; D004951:Esterification; D005463:Fluoroacetates; D008401:Gas Chromatography-Mass Spectrometry; D008722:Methods; D011392:Proline / Q000031:analogs & derivatives
chemical_list: D000596:Amino Acids; D005463:Fluoroacetates; D011392:Proline