Using C1CCOC1, C=C(c1ccccc1)c1cc2c(cn1)C(C)(C)CN2C(=O)OC(C)(C)C to produce CC(C)(C)OC(=O)N1CC(C)(C)c2cnc(C(=O)c3ccccc3)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.