Using O=Cc1c[nH]c2ncccc12, CCOC(=O)C1=C(NC(C)c2ccccc2)OCC1=O to produce CCOC(=O)C1=C(NC(C)c2ccccc2)OC(=Cc2c[nH]c3ncccc23)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.