Using CCCCOc1ccc(CCNc2ncnc(CC)c2C(=O)O)cc1, O=C([O-])[O-] to produce CCCCOc1ccc(CCNc2ncnc(CC)c2C(=O)OC)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.