Using Cc1nc(-c2cn3c(n2)-c2ccc(C4CCN(C(=O)OC(C)(C)C)CC4)cc2OCC3)n(C(C)C)n1 to produce Cc1nc(-c2cn3c(n2)-c2ccc(C4CCNCC4)cc2OCC3)n(C(C)C)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.