Using CCCC1(CC(=O)OCC)OCCc2c1[nH]c1c(Cl)ccc(Cl)c21 to produce CCCC1(CC(=O)O)OCCc2c1[nH]c1c(Cl)ccc(Cl)c21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.