ERROR opening https://cactus.nci.nih.gov/chemical/structure/InChI%3DInChI%26%2361%3B1S/C8H12/c1-2-4-6-8-7-5-3-1/h1-2%2C7-8H%2C3-6H2/b2-1-%2C8-7-/file?format=sdf&get3d=True  -- InChI%3DInChI%26%2361%3B1S/C8H12/c1-2-4-6-8-7-5-3-1/h1-2%2C7-8H%2C3-6H2/b2-1-%2C8-7- could not be loaded.