Using COc1ccc2c(Cc3cccc(CO)n3)c(-c3ccccc3)n(C(=O)OC(C)(C)C)c2c1 to produce COc1ccc2c(Cc3cccc(C=O)n3)c(-c3ccccc3)n(C(=O)OC(C)(C)C)c2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.