Using CCOC(=O)C1=C(Nc2ccc3[nH]ncc3c2)OC(=Cc2c[nH]c3ncccc23)C1=O to produce O=C1C=C(Nc2ccc3[nH]ncc3c2)OC1=Cc1c[nH]c2ncccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.