2-methylpropanoic anhydride 2-thiophenecarboxaldehyde, 5-[[5-[(5-methoxy-2-thienyl)ethynyl]-2-thienyl]ethynyl]- InChI=1/C8H14O3/c1-5(2)7(9)11-8(10)6(3)4/h5-6H,1-4H Isobutyric anhydride