ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1%26%2361%3BCCC%28C%26%2361%3BCCC%28%26%2361%3BCCC1%29C%29%28C%29C/file?format=sdf&get3d=True  -- CC1%26%2361%3BCCC%28C%26%2361%3BCCC%28%26%2361%3BCCC1%29C%29%28C%29C could not be loaded.