2,5-Furandione, dihydro-3-methyl- 2-Methylsuccinic anhydride 3-Methylsuccinic anhydride 4100-80-5 90866-24-3 AI3-11208 EINECS 223-870-5 Methylsuccinic anhydride NSC 65437 PYROTATARIC ANHYDRIDE Pyrotartaric anhydride Succinic anhydride, methyl- (8CI)