Using CCS, O=C(OCc1ccccc1)C1=CCC2C(Cc3ccccc3)C(=O)N12 to produce CCSC1CC2C(Cc3ccccc3)C(=O)N2C1C(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.