Using CCOC(=O)CCC(=O)C(C#N)c1ccc2c(c1)Cc1cccnc1O2 to produce O=C(O)CCC(=O)Cc1ccc2c(c1)Cc1cccnc1O2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.