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