then in the above-mentioned resin, add DIEA, DIC or DMAP, Fmoc-Val-OH, react at 10-50C for 0.5-5 hours, then add blocking reagent methanol, benzoyl chloride or pyridine and react at 10-50C for 0.2-3 hours, resin with isopropanol, N,N-di Methylformamide washes to obtain Fmoc-Val-resin
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Tong KI, Katoh Y, Kusunoki H, Itoh K, Tanaka T, Yamamoto M
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