Using COc1ccc(C(=O)c2c(Cc3ccccc3)oc3ccccc23)c(OC)c1 to produce Oc1ccc(-c2c3ccccc3cc3oc4ccccc4c23)c(O)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.