Using CCOC(=O)C(NCCCNC(=O)[C@@H](NC(=O)OCc1ccccc1)[C@H](C)O)[C@@H](O)[C@H]1O[C@@H](n2ccc(=O)[nH]c2=O)[C@H](OC(C)=O)[C@@H]1OC(C)=O to produce CCOC(=O)C(NCCCNC(=O)[C@@H](N)[C@H](C)O)[C@@H](O)[C@H]1O[C@@H](n2ccc(=O)[nH]c2=O)[C@H](OC(C)=O)[C@@H]1OC(C)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.