Using CC(=O)OC(C)=O, NC1=NC(=O)CN1C(=O)OCc1ccccc1 to produce CC(=O)NC1=NC(=O)CN1C(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.