Using O=C1CN(C(=O)OCc2ccccc2)CCN1Cc1cc2c(Cl)nccc2n1S(=O)(=O)c1ccccc1 to produce O=C1CNCCN1Cc1cc2c(Cl)nccc2n1S(=O)(=O)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.