2-Methyl-2-propenoic acid anhydride 2-Propenoic acid, 2-methyl-, anhydride 4-02-00-01537 (Beilstein Handbook Reference) 760-93-0 BRN 1761982 EINECS 212-084-8 HSDB 6407 METHACRYLIC ANHYDRIDE Methacrylic acid anhydride Methacryloyl anhydride NSC 24159