2-prop-1-yn-1-yl-5-(2-thienylethynyl)thiophene InChI=1/C13H8S2/c1-2-4-12-8-9-13(15-12)7-6-11-5-3-10-14-11/h3,5,8-10H,1H thiophene, 2-(1-propynyl)-5-(2-thienylethynyl)-