Using CC(=O)O, S=P(c1ccccc1)(c1ccc(Cl)cc1)c1ccc(Cl)cc1 to produce O=P(c1ccccc1)(c1ccc(Cl)cc1)c1ccc(Cl)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.