Using COc1ccc(C2Cc3cc(OC)c(OC)c(OC)c3C2=O)cc1 to produce COc1ccc(C2Cc3cc(OC)c(OC)c(OC)c3C2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.