3(2H)-benzofuranone, 6-(acetyloxy)-2-[[3,4-bis(acetyloxy)phenyl]methylene]-, (2Z)- 4-{(Z)-[6-(acetyloxy)-3-oxo-1-benzofuran-2(3H)-ylidene]methyl}-1,2-phenylene diacetate InChI=1/C21H16O8/c1-11(22)26-15-5-6-16-18(10-15)29-20(21(16)25)9-14-4-7-17(27-12(2)23)19(8-14)28-13(3)24/h4-10H,1-3H3/b20-9