ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%3D3CC1c2c%28O%29cc%28C%23CCCCCC%29cc2OC%28C%29%28C%29C1CC%3D3/file?format=sdf&get3d=True  -- CC%3D3CC1c2c%28O%29cc%28C%23CCCCCC%29cc2OC%28C%29%28C%29C1CC%3D3 could not be loaded.