Using Cc1nc2cccc3n(CC4CCN(C(=O)OC(C)(C)C)CC4)c(=O)c1n23 to produce Cc1nc2cccc3n(CC4CCNCC4)c(=O)c1n23, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.