ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/CH6N4.H2O4S/c2-1(3)5-4;1-5(2,3)4/h4H2,(H4,2,3,5);(H2,1,2,3,4)/file?format=sdf&get3d=True  -- InChI=1S/CH6N4.H2O4S/c2-1(3)5-4;1-5(2,3)4/h4H2,(H4,2,3,5);(H2,1,2,3,4) could not be loaded.