Using NC(=O)N1C(=O)Cc2cc(Cl)ccc21, O=C(Cl)c1cccs1 to produce NC(=O)N1C(=O)C(C(=O)c2cccs2)c2cc(Cl)ccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.