Using CCOC(=O)c1ccc2c(c1)[nH]c(=O)c1cnc(C3CCCCC3)n12 to produce O=C(O)c1ccc2c(c1)[nH]c(=O)c1cnc(C3CCCCC3)n12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.