Using CCn1c(=O)n(C2CCN(C(C)(C)CCCNC(=O)OCc3ccccc3)CC2)c2ccccc21 to produce CCn1c(=O)n(C2CCN(C(C)(C)CCCN)CC2)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.