ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%28C3c1ccccc1CCc2ccccc23%29C4CCN%28C%29CC4/file?format=sdf&get3d=True  -- O%28C3c1ccccc1CCc2ccccc23%29C4CCN%28C%29CC4 could not be loaded.