ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC2N%28c1ccccc1CC2%29CCCN3CCC%28CC3%29CCCC/file?format=sdf&get3d=True  -- O%3DC2N%28c1ccccc1CC2%29CCCN3CCC%28CC3%29CCCC could not be loaded.