Using CC(C)(C)OC(=O)NCCC[C@@H](CNC(=O)[C@H](CCCNC(=O)OC(C)(C)C)NC(=O)[C@@H]1Cc2cc(ccc2O)-c2ccc(O)c(c2)C[C@H](NC(=O)OC(C)(C)C)C(=O)N[C@@H](CCCNC(=O)OC(C)(C)C)C(=O)N1)NC(=O)OC(C)(C)C to produce NCCC[C@H](N)CNC(=O)[C@H](CCCN)NC(=O)[C@@H]1Cc2cc(ccc2O)-c2ccc(O)c(c2)C[C@H](N)C(=O)N[C@@H](CCCN)C(=O)N1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.