N[CH:2]([OH:9])[C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.[CH3:10][O:11][C:12](Cl)=[O:13].CC[N:17](C(C)C)C(C)C>>[CH3:10][O:11][C:12](=[O:13])[NH:17][C:4]1[CH:5]=[CH:6][CH:7]=[CH:8][C:3]=1[CH2:2][OH:9]Reaction of aminobenzylalcohol (3 g) with methylchloroformate (1.9 ml) in the presence of DIPEA (12.8 ml) was performed according to the method described in example 22. The residue was chromatographed on silica gel in dichloromethane/ethyl acetate=25/1 as eluent. Yield: 4.19 g.
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