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(1992)Boc-Phe-Phe-OH
diethyl aminomalonate hydrochloride
methyl (2S)-2-amino-3-phenylpropanoate hydrochloride
(S)-methyl 2-((S)-2-(tert-butoxycarbonylamino)-3-phenylpropanamido)-3-phenylpropanoate
N-tert-butoxycarbonyl-L-phenylalanine