Using O=c1ccn(Cc2ccccc2)c2oc(I)c(-c3ccccc3)c12, ClC(Cl)Cl to produce Clc1ccnc2oc(I)c(-c3ccccc3)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.