Using COc1cccc(-c2nc3ncc(-c4ccccc4)cc3n2CC(=O)OC(C)(C)C)c1 to produce COc1cccc(-c2nc3ncc(-c4ccccc4)cc3n2CC(=O)O)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.