Using O=P(Cl)(Cl)Cl, CCCCc1ccc2nc(C(=O)OCC)cc(O)c2c1 to produce CCCCc1ccc2nc(C(=O)OCC)cc(Cl)c2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.