ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI=1S/C8H8N4/c1-6(2)5-12-8(4-10)7(11)3-9/h5H,1,11H2,2H3/b8-7?,12-5+/file?format=sdf&get3d=True  -- InChI=1S/C8H8N4/c1-6(2)5-12-8(4-10)7(11)3-9/h5H,1,11H2,2H3/b8-7?,12-5+ could not be loaded.