ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C4H4N4O2S.H3N/c5-2-1(8-10)3(9)7-4(11)6-2;/h(H4,5,6,7,9,11);1H3/file?format=sdf&get3d=True  -- InChI=1S/C4H4N4O2S.H3N/c5-2-1(8-10)3(9)7-4(11)6-2;/h(H4,5,6,7,9,11);1H3 could not be loaded.