Using C=C1C(Cc2ccc(Cl)cc2)CCCCC1(C)C, O=C(OO)c1cccc(Cl)c1 to produce CC1(C)CCCCC(Cc2ccc(Cl)cc2)C12CO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.