Using CCCc1c(COc2ccc3c(=O)cc(C(=O)OCC)oc3c2CCC)ccc(C(C)=O)c1O to produce CCCc1c(COc2ccc3c(=O)cc(C(=O)O)oc3c2CCC)ccc(C(C)=O)c1O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.