ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C6H12O2/c1-2-3-4-5-6(7)8/h2-5H2,1H3,(H,7,8)/file?format=sdf&get3d=True  -- InChI=1S/C6H12O2/c1-2-3-4-5-6(7)8/h2-5H2,1H3,(H,7,8) could not be loaded.