ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%28OCCN%28CC%29CC%29C%28c1ccccc1%29%28c2ccccc2%29CCC/file?format=sdf&get3d=True  -- O%3DC%28OCCN%28CC%29CC%29C%28c1ccccc1%29%28c2ccccc2%29CCC could not be loaded.