Using O=C(O)CNC(=O)OCC1c2ccccc2-c2ccccc21, Oc1c(F)c(F)c(F)c(F)c1F to produce O=C(CNC(=O)OCC1c2ccccc2-c2ccccc21)Oc1c(F)c(F)c(F)c(F)c1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.