Using Cc1c(N2CC3CN(Cc4ccccc4)CC3C2)nn2cc(-c3ccc(F)cc3)nc2c1C, ClI to produce Cc1c(N2CC3CN(Cc4ccccc4)CC3C2)nn2c(I)c(-c3ccc(F)cc3)nc2c1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.