ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C5H11NO2/c6-4-2-1-3-5(7)8/h1-4,6H2,(H,7,8)/file?format=sdf&get3d=True  -- InChI=1S/C5H11NO2/c6-4-2-1-3-5(7)8/h1-4,6H2,(H,7,8) could not be loaded.