Using O=C([O-])[O-], CC(C)(C)c1csc(-c2cc3cc(OCc4ccccc4CCl)ccc3o2)n1 to produce CC(C)(C)c1csc(-c2cc3cc(OCc4ccccc4C=O)ccc3o2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.