4-oxo-4-(2-thienyl)butyric acid3-(2-Thenoyl)propionic acid3-(2-thenoyl)propanoic acid4-(2-thiophenyl)-4-oxobutanoic acid4-(thien-2-yl)-4-oxobutanoic acid4-(thien-2-yl)-4-oxobutyric acid4-oxo-4-(2-thiophenyl)butanoic acid4-oxo-4-(thien-2-yl)butanoic acid4-oxo-4-(thien-2-yl)butyric acid