Using COC(=O)c1ccc(CN2CN(c3ccccc3)C3(CCN(C(=O)OC(C)(C)C)CC3)C2=O)cc1 to produce COC(=O)c1ccc(CN2CN(c3ccccc3)C3(CCNCC3)C2=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.