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Stage #1: (((9H-fluoren-9-yl)methoxy)carbonyl)glycine With N-ethyl-N,N-diisopropylamine In dichloromethane at 20℃; for 4h;
Stage #2: With piperidine In N,N-dimethyl-formamide at 20℃; for 0.166667h;
Stage #3: Fmoc-D-Phe-OH; fmoc-N-methyl-L-valine; Fmoc-Arg(pg)-OH; Fmoc-Asp(pg)-OH Further stages;