Using CCCc1ccc(CC[C@H]2CC[C@H](CCc3ccccc3)CC2)cc1, O=C(Cl)C(=O)Cl to produce CCCc1ccc(CC[C@H]2CC[C@H](CCc3ccccc3C(=O)Cl)CC2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.