Using COC(Cn1ncc2cc(-n3ccc(OCc4ccccc4)cc3=O)ccc21)OC to produce COC(Cn1ncc2cc(-n3ccc(O)cc3=O)ccc21)OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.