Using CCN1C(=O)C(=O)c2c(OC)ccc(C3CCc4cc(OC)ccc4C3)c21 to produce CCn1ccc2c(O)ccc(C3CCc4cc(O)ccc4C3)c21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.