Using O=c1c(I)c(-c2ccccc2)oc2c1ccc1cn[nH]c12, [O-]Cl to produce O=c1c(I)c(-c2ccccc2)oc2c1ccc1c(Cl)n[nH]c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.