Using COc1ccc2c(c1OC)C(C)(C)N1CCc3cc4c(cc3C1=C2)OCO4 to produce COc1ccc2c(c1OC)C(C)(C)N1CCc3cc4c(cc3C1C2)OCO4, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.