2H-Pyran-2,6(3H)-dione, dihydro-4,4-dimethyl- 3,3-Dimethylglutaric anhydride 4160-82-1 AI3-11032 Dihydro-4,4-dimethyl-2H-pyran-2,6(3H)-dione EINECS 223-998-1 Glutaric anhydride, 3,3-dimethyl- Glutaric anhydride, beta,beta-dimethyl- NSC 2827