Using Cc1nc2c(F)cc(C(C)(C)C)cc2c(O)c1C, CCCC(=O)Cl to produce CCCC(=O)c1c(C)c(C)nc2c(F)cc(C(C)(C)C)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.