Using CCCCOC(=O)c1nc(O)c2cc(Oc3ccc4oc(N(C)C)nc4c3)ccc2c1O, O=P(Cl)(Cl)Cl to produce CCCCOC(=O)c1nc(Cl)c2cc(Oc3ccc4oc(N(C)C)nc4c3)ccc2c1O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.