ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1/C2H7NO3S/c3-1-2-7(4,5)6/h1-3H2,(H,4,5,6)/file?format=sdf&get3d=True  -- InChI=1/C2H7NO3S/c3-1-2-7(4,5)6/h1-3H2,(H,4,5,6) could not be loaded.