Using COCCn1c(-c2ccc(Cl)s2)n[nH]c1=O, CCOC(=O)CCl to produce CCOC(=O)Cn1nc(-c2ccc(Cl)s2)n(CCOC)c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.