ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C4H9NO2/c5-3-1-2-4(6)7/h1-3,5H2,(H,6,7)/file?format=sdf&get3d=True  -- InChI=1S/C4H9NO2/c5-3-1-2-4(6)7/h1-3,5H2,(H,6,7) could not be loaded.