2,3-DIMETHYLMALEIC ANHYDRIDE 2,5-Furandione, 3,4-dimethyl- 766-39-2 Dimethylmaleic acid anhydride Dimethylmaleic anhydride EINECS 212-165-8 HSDB 5517 Maleic anhydride, dimethyl- NSC 92512 Pyrocinchonic anhydride alpha,beta-Dimethylmaleic anhydride