Synthesis of the galactosyl peptide dendrimers: a) FmocAAOH, PyBOP, DIEA, NMP, 1–3 h (2×), then 20 % piperidine in DMF, (2×10 min), b) GalA or GalB, HCTU, DIEA, NMP, or acetylation c) MeOH/NH3/H2O (v/v 8:1:1), then TFA/TIS/H2O (95:2.5:2.5). Fmoc=9-fluorenylmethyloxycarbonyl, PyBOP=1-benzotriazolyloxy-tris(pyrollidino)phosphonium, DIEA=diisopropylethylamine, NMP=N-methylpyrrolidone, DMF=N,N-dimethylformamide, HCTU=2-(6-Chloro-1-H-benzotriazole-1-yl)-1,1,3,3-tetramethylaminium hexafluorophosphate, TFA=trifluoroacetic acid, TIS=triisopropylsilane, Lys=lysine as branching unit, K=lysine (Lys), P=proline (Pro), L=leucine (Leu), F=phenylalanine (Phe).