Using COC(=O)[C@@H](CCCN(Cc1ccccn1)C(=O)OC(C)(C)C)C(=O)c1ccc(CN(Cc2ccccn2)C(=O)OC(C)(C)C)cc1 to produce CC(C)(C)OC(=O)N(CCC[C@H](C(=O)O)C(=O)c1ccc(CN(Cc2ccccn2)C(=O)OC(C)(C)C)cc1)Cc1ccccn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.