Using O=C(CC(CCO)c1ccc(Cl)c(Cl)c1)n1ccc2ccccc21 to produce O=CCC(CC(=O)n1ccc2ccccc21)c1ccc(Cl)c(Cl)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.