ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C6H7NO/c1-5-2-3-6(8)7-4-5/h2-4H,1H3,(H,7,8)/file?format=sdf&get3d=True  -- InChI=1S/C6H7NO/c1-5-2-3-6(8)7-4-5/h2-4H,1H3,(H,7,8) could not be loaded.