ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN1CCC%28%3DC2c3ccccc3CCn4c%28C%3DO%29cnc24%29CC1/file?format=sdf&get3d=True  -- CN1CCC%28%3DC2c3ccccc3CCn4c%28C%3DO%29cnc24%29CC1 could not be loaded.