ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C7H8N2/c1-2-4-7-6%283-1%298-5-9-7/h1-4%2C8-9H%2C5H2/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/C7H8N2/c1-2-4-7-6%283-1%298-5-9-7/h1-4%2C8-9H%2C5H2 could not be loaded.