Using CSc1ccc(-n2ccc(OC3CCN(C(=O)OCc4ccccc4)CC3)cc2=O)cc1 to produce CSc1ccc(-n2ccc(OC3CCNCC3)cc2=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.