ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C8H12N2O2/c11-7-9-5-3-1-2-4-6-10-8-12/h1-6H2/file?format=sdf&get3d=True  -- InChI%3DInChI%3D1S/C8H12N2O2/c11-7-9-5-3-1-2-4-6-10-8-12/h1-6H2 could not be loaded.