Using COc1cc(CC(=O)C(CCO)c2cc(OC)c(OC)c(OC)c2)cc(OC)c1OC to produce COc1cc(C2CCC(c3cc(OC)c(OC)c(OC)c3)C2=O)cc(OC)c1OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.