Using O=C(Cl)CC12CC3CC(CC(C3)C1)C2, CC(C)CNC(=O)[C@@H]1CCCN1C(=O)[C@H](CCCCNC(=O)OCc1ccccc1)NC(=O)OC(C)(C)C to produce CC(C)CNC(=O)[C@@H]1CCCN1C(=O)[C@H](CCCCNC(=O)OCc1ccccc1)NC(=O)CC12CC3CC(CC(C3)C1)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.