Using CCNc1ncc2c(n1)N1CCC[C@H]1CN(c1cncc(N3CCN(C(=O)OC(C)(C)C)CC3)c1)C2=O to produce CCNc1ncc2c(n1)N1CCC[C@H]1CN(c1cncc(N3CCNCC3)c1)C2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.