Using CCN1C(=O)[C@H](CCCNC(=O)OC(C)(C)C)NC(=O)[C@@H](NC(=O)OC(C)(C)C)Cc2cc(ccc2O)-c2ccc(O)c(c2)C[C@H]1C(=O)NCCC[C@H](N)CC(=O)NCCN to produce CCN1C(=O)[C@H](CCCN)NC(=O)[C@@H](N)Cc2cc(ccc2O)-c2ccc(O)c(c2)C[C@H]1C(=O)NCCC[C@H](N)CC(=O)NCCN, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.