ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C4H6N4OS/c1-3-6-7-4(10)8(3)5-2-9/h2H,1H3,(H,5,9)(H,7,10)/file?format=sdf&get3d=True  -- InChI=1S/C4H6N4OS/c1-3-6-7-4(10)8(3)5-2-9/h2H,1H3,(H,5,9)(H,7,10) could not be loaded.