Using COc1ccc(-c2cc(=O)[nH]c(=O)[nH]2)cc1OC, CI to produce COc1ccc(-c2cc(=O)n(C)c(=O)[nH]2)cc1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.