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3-(2-Thienyl)-1H-pyrazole19933-24-530 % similar 3-(2-Thienyl)pyridine21298-53-330 % similar 2-Benzenesulfonylthiophene22407-40-530 % similar Thieno(3,2-b)thiophene251-41-230 % similar 2-Pentylthiophene4861-58-930 % similar