ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN%28C%29CCCN1CC2%3DCC%3DCC%3DC2CC3%3DCC%3DCC%3DC31/file?format=sdf&get3d=True  -- CN%28C%29CCCN1CC2%3DCC%3DCC%3DC2CC3%3DCC%3DCC%3DC31 could not be loaded.