ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28C%29%28C%29%5BC%40%40H%5D%28CO%29NC%28%3DO%29C1%3DNN%28C2%3DC1C%5BC%40H%5D3%5BC%40%40H%5D2C3%29C4%3DNC%3DC%5BN%2B%5D%28%3DC4%29%5BO-%5D/file?format=sdf&get3d=True  -- CC%28C%29%28C%29%5BC%40%40H%5D%28CO%29NC%28%3DO%29C1%3DNN%28C2%3DC1C%5BC%40H%5D3%5BC%40%40H%5D2C3%29C4%3DNC%3DC%5BN%2B%5D%28%3DC4%29%5BO-%5D could not be loaded.