US7951962B2 - Organic Semiconductor Compound, Organic Semiconductor Thin Film, Organic Semiconductor Coating Liquid, Organic Thin Film Transistor, Methods for Producing Bis(benzo[4,5] Thieno)[2,3-B:3′2′-E][1,4]dithin and Bis(benzo [4,5]thieno)[2,3-B:2′3′-E][1,4]dithiin