(E)-2-Methylcrotonic acid 2-Butenoic acid, 2-methyl-, (E)- 80-59-1 Cevadic acid Crotonic acid, 2-methyl-, (E)- NSC44235 TIGLIC ACID Tiglinic acid trans-.alpha.,.beta.-Dimethylacrylic acid trans-2,3-Dimethylacrylic acid trans-2-Methyl-2-butenoic acid trans-2-Methylcrotonic acid