Using COC(=O)c1cnc(NC2CCN(C(=O)OC(C)(C)C)CC2)cc1C(F)(F)F to produce COC(=O)c1cnc(NC2CCNCC2)cc1C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.