Using CCOC(=O)c1cc(C(=O)C=CN(C)C)c(=O)[nH]c1C(=O)OCC to produce CCOC(=O)c1cc2c(=O)ccoc2nc1C(=O)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.