Using CC(C)(C)c1ccc2c(c1)-c1cc(C(C)(C)C)ccc1C2, COCCl to produce CC(C)(C)c1ccc2c(c1)-c1cc(C(C)(C)C)c(CCl)cc1C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.