ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C6H6O/c1-2-6-4-3-5-7-6/h2-5H,1H2/file?format=sdf&get3d=True  -- InChI=1S/C6H6O/c1-2-6-4-3-5-7-6/h2-5H,1H2 could not be loaded.