Using COC(=O)c1ccc2c(c1)N(C(=O)c1ccc(C3CCCCC3)cc1)Cc1cccn1C2 to produce O=C([O-])c1ccc2c(c1)N(C(=O)c1ccc(C3CCCCC3)cc1)Cc1cccn1C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.