Using Cc1sc(-c2ccc(Cl)cc2)nc1C1C(=O)CCC1=O, O=C([O-])[O-] to produce COC1=C(c2nc(-c3ccc(Cl)cc3)sc2C)C(=O)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.