ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C6H6O2/c7-5-2-1-3-6(8)4-5/h1-4,7-8H/file?format=sdf&get3d=True  -- InChI=1S/C6H6O2/c7-5-2-1-3-6(8)4-5/h1-4,7-8H could not be loaded.