含不定量的酸酐.Reactant involved in: Addition reactions with 1,8-naphthyridine N-oxides Iodocyclization and palladium-catalyzed coupling reactions for synthesis of pyranoquinolines Suzuki coupling reactions for synthesis of combretastatin analogs Suzuki-Miyaura coupling reactions for synthesis of aryl-substituted oxabenzindoles and methanobenzindoles Palladium-catalyzed oxyarylation of Heck reaction intermediates C-H functionalization of quinones Contains different amounts of anhydride