ERROR opening https://cactus.nci.nih.gov/chemical/structure/C%5BN%2B%5D%28C%29%28C%29%5BC%40%40H%5D%28CC1%3DCN%3DC%28N1%29%5BSe%5D%29C%28%3DO%29%5BO-%5D/file?format=sdf&get3d=True  -- C%5BN%2B%5D%28C%29%28C%29%5BC%40%40H%5D%28CC1%3DCN%3DC%28N1%29%5BSe%5D%29C%28%3DO%29%5BO-%5D could not be loaded.