.alpha.-Thenoyltrifluoroacetone 1,1,1-Trifluoro-3-(2-thenoyl)acetone 1,3-Butanedione, 4,4,4-trifluoro-1-(2-thienyl)- 1-Thenoyl-3,3,3-trifluoroacetone 2-Thenoyltrifluoroacetone 326-91-0 NSC66544 Perfluoroacetyl(2-thenoyl)methane TTA TTB Thenoyltrifluoroacetone