ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C8H12N2/c1-5-6%282%2910-8%284%297%283%299-5/h1-4H3/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/C8H12N2/c1-5-6%282%2910-8%284%297%283%299-5/h1-4H3 could not be loaded.