Using Cc1ccccc1, ClCc1ccc(-c2ccc(CCl)cc2)cc1 to produce Cc1ccc(Cc2ccc(-c3ccc(Cc4ccc(C)cc4)cc3)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.