ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C3H6N2O2/c4-2-5-1-3(6)7/h2H,1H2,(H2,4,5)(H,6,7)/file?format=sdf&get3d=True  -- InChI=1S/C3H6N2O2/c4-2-5-1-3(6)7/h2H,1H2,(H2,4,5)(H,6,7) could not be loaded.