ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C4H5NS/c1-2-3-5-4-6/h2H,1,3H2/file?format=sdf&get3d=True  -- InChI=1S/C4H5NS/c1-2-3-5-4-6/h2H,1,3H2 could not be loaded.