ERROR opening https://cactus.nci.nih.gov/chemical/structure/C%5BC%40%40H%5D1CC%5BC%40%40H%5D2%5BC%40%40H%5D%28C2%28C%29C%29C3%3DC%28CC%5BC%40H%5D13%29C/file?format=sdf&get3d=True  -- C%5BC%40%40H%5D1CC%5BC%40%40H%5D2%5BC%40%40H%5D%28C2%28C%29C%29C3%3DC%28CC%5BC%40H%5D13%29C could not be loaded.