ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C3H7NS/c1-2-5-3-4-1/h4H,1-3H2/file?format=sdf&get3d=True  -- InChI=1S/C3H7NS/c1-2-5-3-4-1/h4H,1-3H2 could not be loaded.