Using C=O, Cc1ccc(-c2cc(Br)c3[nH]c(=O)ccc3c2)c(C)n1 to produce Cc1ccc(-c2cc(CO)c3[nH]c(=O)ccc3c2)c(C)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.