Using Cc1ccc(CN2CCN(C(=O)OC(C)(C)C)CC2)cc1NC(=O)CN(C(=O)OC(C)(C)C)c1ccc(F)c(F)c1 to produce Cc1ccc(CN2CCNCC2)cc1NC(=O)CNc1ccc(F)c(F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.