Using CN(CCC(=O)NNC(=O)[C@@H]1CC[C@@H]2CN1C(=O)N2OCc1ccccc1)C(=O)OC(C)(C)C to produce CN(CCc1nnc([C@@H]2CC[C@@H]3CN2C(=O)N3OCc2ccccc2)o1)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.