ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C3H7NO2/c1-4-2-3(5)6/h4H,2H2,1H3,(H,5,6)/file?format=sdf&get3d=True  -- InChI=1S/C3H7NO2/c1-4-2-3(5)6/h4H,2H2,1H3,(H,5,6) could not be loaded.