Using CC(C)(CO)CNc1c(Cl)ccc2c1CCN(C(=O)C(F)(F)F)CC2 to produce CC1(C)CN(c2c(Cl)ccc3c2CCN(C(=O)C(F)(F)F)CC3)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.