Using CSC1CC2(CCN(C(=O)Nc3ccc(-c4ccccc4)cc3)CC2)c2ccccc21, CO to produce CS(=O)C1CC2(CCN(C(=O)Nc3ccc(-c4ccccc4)cc3)CC2)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.