Using CN(Cc1cc2c(o1)CN(C(=O)c1ccc(C(=O)c3ccccc3)cc1)CC2)C(=O)OC(C)(C)C to produce CNCc1cc2c(o1)CN(C(=O)c1ccc(C(=O)c3ccccc3)cc1)CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.