Using CN, Cc1cccc(Sc2cc(C=O)nn2-c2ccccc2Cl)n1 to produce CNCc1cc(Sc2cccc(C)n2)n(-c2ccccc2Cl)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.