amino acid derivative article 16 priority journal 12 nonhuman 10 unclassified drug 8 controlled study 6 Amino acids 4 Animals 4 Molecular Sequence Data 4 Trypanosoma cruzi 4 amino acid 4 amino acid synthesis 4 animal cell 4 carbon 4 chirality 4 ester 4 glutamic acid 4 glycine 4 monomer 4 nuclear magnetic resonance 4 temperature 4 2 amino 5 phosphonovaleric acid 2 4,5,6 trihydroxynorleucine 2 5 amino 4 hydropentanoic acid 2 5 amino 5 deoxy dextro xylonic acid 2 5 amino 5 deoxy levo arabinonic acid 2 5 hydroxynorvaline 2 ALA 2 ALA derivatives 2 ALA esters 2