Using Clc1cc(Cl)nc(-c2ccc(Cl)s2)n1, Oc1ccnc(Cl)c1 to produce Clc1cc(Oc2cc(Cl)nc(-c3ccc(Cl)s3)n2)ccn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.