ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C2H6O4S/c1-2-6-7(3,4)5/h2H2,1H3,(H,3,4,5)/file?format=sdf&get3d=True  -- InChI=1S/C2H6O4S/c1-2-6-7(3,4)5/h2H2,1H3,(H,3,4,5) could not be loaded.