ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%3D1S/C8H8N2O2/c1-10-4-3-7%2812-2%296%285-9%298%2810%2911/h3-4H%2C1-2H3/file?format=sdf&get3d=True -- InChI%3DInChI%3D1S/C8H8N2O2/c1-10-4-3-7%2812-2%296%285-9%298%2810%2911/h3-4H%2C1-2H3 could not be loaded.