Using CCO, O=C1c2cc(Cl)ccc2-c2csc(N3C(=O)c4ccccc4C3=O)c21 to produce Cc1cccc2c1-c1csc(N)c1C2=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.