Using COc1ccc2c(c1)-c1c(nc(NC(=O)C(C)(C)C)[nH]c1=O)CC2 to produce COc1ccc2ccc3nc(NC(=O)C(C)(C)C)[nH]c(=O)c3c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.