Using CN(CCO)c1ccc(-c2cc3nccnc3c(NCC3CN(C(=O)OC(C)(C)C)CCC3(F)F)n2)cc1 to produce CN(CCO)c1ccc(-c2cc3nccnc3c(NCC3CNCCC3(F)F)n2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.