ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C4H8O2S/c5-3-1-7-2-4(3)6/h3-6H,1-2H2/file?format=sdf&get3d=True  -- InChI=1S/C4H8O2S/c5-3-1-7-2-4(3)6/h3-6H,1-2H2 could not be loaded.