1: Fmoc-β-Ala-Wang resin With piperidine in 1-methyl-pyrrolidin-2-one 0.666667 h; solid phase reaction; 2: 4-formyl-benzoic acid With benzotriazol-1-ol; diisopropyl-carbodiimide in 1-methyl-pyrrolidin-2-one; acetonitrile T=20°C; 16 h; solid phase reaction; 3: 4-trifluoromethylaniline; 2-bromo-1-(4-chloro-phenyl)-ethanone; fluorenylmethyloxycarbonyl isothiocyanate Further stages;