Synonyms: Cyclopropanecarboxylicacid, 2,2,3,3-tetramethyl-, 2-methyl-4-oxo-3-(2-propenyl)-2-cyclopenten-1-ylester (9CI); Cyclopropanecarboxylic acid, 2,2,3,3-tetramethyl-, ester with2-allyl-4-hydroxy-3-methyl-2-cyclopenten-1-one (8CI); 2-Cyclopenten-1-one,2-allyl-4-hydroxy-3-methyl-, 2,2,3,3-tetramethylcyclopropanecarboxylate (8CI);(?à)-Terallethrin; Knockthrin; M108; Terallethrin