ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1/C3H7NO2/c1-2(4)3(5)6/h2H,4H2,1H3,(H,5,6)/file?format=sdf&get3d=True  -- InChI=1/C3H7NO2/c1-2(4)3(5)6/h2H,4H2,1H3,(H,5,6) could not be loaded.