Using CCOC(=O)c1cc2ccc(SCc3ccc(OC)cc3)cc2nc1Cl, CO to produce COC(=O)c1cc2ccc(SCc3ccc(OC)cc3)cc2nc1OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.