Using CCOC(=O)c1cc2c(cn1)C1(CN(C(=O)OC(C)(C)C)C1)OC2 to produce CC(C)(C)OC(=O)N1CC2(C1)OCc1cc(C=O)ncc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.