abstract |
The following general formula (I) (Where A is And B is And R is H, NO 2 , NH 2 , NHCbz, Br, F, Cl or SO 3 Na 2 , and n is an integer of 1 to 4), and an active ester and t- A method for producing the above compound, comprising a reaction with a butoxycarbonylaminoethylamine or an ω-amino acid derivative. |