Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Gutheil William G. and Xu Qingchai,N-to-C Solid-Phase Peptide and Peptide Trifluoromethylketone Synthesis Using Amino Acid tert-Butyl Esters.,Chemical and Pharmaceutical Bulletin,00092363,The Pharmaceutical Society of Japan,2002,50,5,688-691,https://cir.nii.ac.jp/crid/1390001204164137728,https://doi.org/10.1248/cpb.50.688