Using CC(C)(C)OC(=O)N(CCN(Cc1ccc(F)cc1)C(=O)OC(C)(C)C)CCN1C(=O)c2ccccc2C1=O to produce CC(C)(C)OC(=O)N(CCN)CCN(Cc1ccc(F)cc1)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.