Using CC(=O)CC(=O)C(F)(F)F, Nc1sc2c(c1C(=O)c1ccccc1)CCC2 to produce Cc1nc2sc3c(c2c(-c2ccccc2)c1C(=O)C(F)(F)F)CCC3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.