Using CC(C)(C)OC(=O)n1c(CN2CCN(C(=O)OCc3ccccc3)CC2=O)cc2cnccc21 to produce CC(C)(C)OC(=O)n1c(CN2CCNCC2=O)cc2cnccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.