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A	B	C	D	E	F
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M	N	O	P	Q	R
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Y	Z

Z-Arg(Mtr)-OH.CHA

N-α,N-ω-,N-ω′-Tri-Z-D-arginine

N-ω-Nitro-L-arginine benzyl ester

N-ω-tosyl-D-arginine

Acetyl-L-asparagine

N-α-Boc-L-asparagine

L-Asparagine tert.butyl ester hydrochloride

N-α-Boc-N-γ-xanthyl-D-asparagine

N-α- Phthaloyl-L-asparagine

N-α-Tosyl-L-asparagine