Using CC(C)(C)[Si](C)(C)Oc1cc(C(=O)O)cc(OCc2ccccc2)c1O[Si](C)(C)C(C)(C)C, O=C(Cl)C(=O)Cl to produce CC(C)(C)[Si](C)(C)Oc1cc(C(=O)Cl)cc(OCc2ccccc2)c1O[Si](C)(C)C(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.