Using CCN(CC)CCn1ncc2ccc(C3CCN(C(=O)OC(C)(C)C)CC3)cc21 to produce CCN(CC)CCn1ncc2ccc(C3CCN(C)CC3)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.