Using COCOc1cccnc1, O=Cc1ccc(CCOC(=O)c2ccccc2)cc1 to produce COCOc1cnccc1C(O)c1ccc(CCOC(=O)c2ccccc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.