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