Using CC1(C)C(=O)N(C(=O)NCC2(O)CCN(Cc3ccccc3)CC2)c2ccccc21 to produce CC1(C)C(=O)N(C(=O)NCC2(O)CCNCC2)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.