ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C8H16N4/c1-2-4-7(9)5-3-6-12-8(10)11/h4,7H,1,3,5-6,9H2,(H4,10,11,12)/file?format=sdf&get3d=True  -- InChI=1S/C8H16N4/c1-2-4-7(9)5-3-6-12-8(10)11/h4,7H,1,3,5-6,9H2,(H4,10,11,12) could not be loaded.