Using COc1c(F)c(F)cc2c(=O)c(C(=O)O)cn(C3CC3)c12 to produce O=C(O)c1cn(C2CC2)c2c(O)c(F)c(F)cc2c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.