Using O=C([O-])[O-], C=CCn1c(Cl)nc2c1c(=O)[nH]c(=O)n2CCCCC to produce C=CCn1c(Cl)nc2c1c(=O)n(C)c(=O)n2CCCCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.