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A	B	C	D	E	F
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Y	Z

Boc-s-3,4-dimethylbenzyl-l-cysteine

Ac-phe(4-nh2)-oh

Z-4-fluoro-l-phenylalanine chloromethylketone

L-alanine 4-methoxy--naphthylamide hydrochloride

(2R,3r)-(fmoc-amino)-3-(boc-amino)butyric acid

L-valine amide hydrobromide

L-tryptophan β-naphthylamide

L-pyroglutamic acid pentachlorophenyl ester

L-glutamic acid γ-(α-naphthylamide)

Boc-l-threonine 4-nitrophenyl ester