Using O=C(c1ccc2c(c1)CCCN2)N1CC(N2CCN(C(=O)C(F)(F)F)CC2)C1 to produce O=C(c1ccc2c(c1)CCCN2)N1CC(N2CCNCC2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.