ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C6H7NO/c8-5-6-2-1-3-7-4-6/h1-4,8H,5H2/file?format=sdf&get3d=True  -- InChI=1S/C6H7NO/c8-5-6-2-1-3-7-4-6/h1-4,8H,5H2 could not be loaded.