Using CC(C)(C)OC(=O)N1CCN(C(=O)Cl)CC1, COc1ncnc2sc(N)nc12 to produce COc1ncnc2sc(NC(=O)N3CCN(C(=O)OC(C)(C)C)CC3)nc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.