2-furancarboxaldehyde, 5-[(1E)-3-oxo-1-butenyl]- 5-[(1E)-3-oxobut-1-en-1-yl]-2-furaldehyde InChI=1/C9H8O3/c1-7(11)2-3-8-4-5-9(6-10)12-8/h2-6H,1H3/b3-2