Using COc1nnc(-c2ccncc2)cc1-c1c(C)c2ccccc2n1C(=O)OC(C)(C)C to produce Cc1c(-c2cc(-c3ccncc3)n[nH]c2=O)[nH]c2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.