Using C#CC(=O)O, CC1Cc2[nH]c(CC(=O)c3ccc(F)cc3F)nc2C(C)C1 to produce CC1Cc2c([nH]c3c(C(=O)c4ccc(F)cc4F)ccc(=O)n23)C(C)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.