ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1CCC2CN3CCC4%3DC%28NC5%3DC4C%3DCC%3DC5%29C3CC2C1/file?format=sdf&get3d=True  -- C1CCC2CN3CCC4%3DC%28NC5%3DC4C%3DCC%3DC5%29C3CC2C1 could not be loaded.