Using CCOC(=O)NNC(=O)Nc1c(F)c(F)c(F)c(F)c1F to produce O=c1[nH][nH]c(=O)n1-c1c(F)c(F)c(F)c(F)c1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.