ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C4H8O2S/c5-7(6)3-1-2-4-7/h1-4H2/file?format=sdf&get3d=True  -- InChI=1S/C4H8O2S/c5-7(6)3-1-2-4-7/h1-4H2 could not be loaded.