ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C2H6O3S2.Na/c3-7(4,5)2-1-6/file?format=sdf&get3d=True  -- InChI=1S/C2H6O3S2.Na/c3-7(4,5)2-1-6 could not be loaded.