(R)-2-{(S)-2-[2-((S)-2-Formylamino-3-methyl-butyrylamino)-acetylamino]-propionylamino}-4-methyl-pentanoic acid

[1-[2',5'-bis-O-(tert-butyldimethylsilyl)-β-D-ribofuranosyl]-3-N-[3-N'-[valyl-glycylamino]propyl]thymine]-3'-spiro-5''-[4''-amino-1'',2''-oxathiole-2'',2''-dioxide]

Boc-AsnGlnTrpAlaValGly-OH

N-benzyloxycarbonyl-L-valylglycyl-Nε-tert-butoxycarbonyl-L-lysyl-Nε-tert-butoxycarbonyl-L-lysine

Z-L-Val-Gly-L-Lys(BOC)-L-Lys(BOC)-L-Arg(NO2)-L-Arg(NO2)-L-Pro-OH