Using NCc1nc2ncccc2c(=O)[nH]1, O=C(O)CCc1ccccc1 to produce O=C(CCc1ccccc1)NCc1nc2ncccc2c(=O)[nH]1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.