Using CCS, O=c1c(Cl)c(Cl)cnn1-c1cc(-c2ccnc(Nc3cccc(Cl)c3)n2)ccn1 to produce CCSc1cnn(-c2cc(-c3ccnc(Nc4cccc(Cl)c4)n3)ccn2)c(=O)c1Cl, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.