Boc-Phe-Val-OBn

(2S,3R,4S,5S,6S)-2-(4-(hydroxymethyl)-2-nitrophenoxy)-6-(methoxycarbonyl)tetrahydro-2H-pyran-3,4,5-triyl triacetate

(2S,3S,4S,5R,6S)-3,4,5-Triacetoxy-6-[4-(2,5-dioxo-pyrrolidin-1-yloxycarbonyloxymethyl)-2-nitro-phenoxy]-tetrahydro-pyran-2-carboxylic acid methyl ester