ERROR opening https://cactus.nci.nih.gov/chemical/structure/n3c%28%5CC%28%3DC%5CCN1CCCC1%29c2ccc%28cc2%29C%29cccc3/file?format=sdf&get3d=True  -- n3c%28%5CC%28%3DC%5CCN1CCCC1%29c2ccc%28cc2%29C%29cccc3 could not be loaded.