Using CSC1(S(=O)(=O)c2ccccc2)C[C@H]2C[C@@]2(c2cccc3ccccc23)C1, CO to produce O=C1C[C@H]2C[C@@]2(c2cccc3ccccc23)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.