Using CC(C)(C)OC(=O)NC1CC2(CCN(C(=O)OCc3ccccc3)CC2)CC1O to produce CC(C)(C)OC(=O)NC1CC2(CCNCC2)CC1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.