Using CCOC(OCC)N1C(=O)C(c2ncnc3cc(OCCOC)c(OC)cc23)c2ccccc21 to produce O=C1Nc2ccccc2C1c1ncnc2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.