Using O=c1[nH]c2ccc(Cl)cc2c(-c2ccccc2)c1-c1cc(CO)no1 to produce O=Cc1cc(-c2c(-c3ccccc3)c3cc(Cl)ccc3[nH]c2=O)on1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.