ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCC1%3DC%28C2%3DNC1%3DCC3%3DC%28C4%3DC%28%5BC%40%40H%5D%28C%28%3DC4%5BN-%5D3%29C5%3DNC%28%3DCC6%3DNC%28%3DC2%29C%28%3DC6C%29C%3DC%29%5BC%40H%5D%28%5BC%40%40H%5D5CCC%28%3DO%29OC/C%3DC%28%5CC%29/CCC%5BC%40H%5D%28C%29CCC%5BC%40H%5D%28C%29CCCC%28C%29C%29C%29C%28%3DO%29OC%29%5BO-%5D%29C%29C%3DO.%5BMg%2B2%5D/file?format=sdf&get3d=True  -- CCC1%3DC%28C2%3DNC1%3DCC3%3DC%28C4%3DC%28%5BC%40%40H%5D%28C%28%3DC4%5BN-%5D3%29C5%3DNC%28%3DCC6%3DNC%28%3DC2%29C%28%3DC6C%29C%3DC%29%5BC%40H%5D%28%5BC%40%40H%5D5CCC%28%3DO%29OC/C%3DC%28%5CC%29/CCC%5BC%40H%5D%28C%29CCC%5BC%40H%5D%28C%29CCCC%28C%29C%29C%29C%28%3DO%29OC%29%5BO-%5D%29C%29C%3DO.%5BMg%2B2%5D could not be loaded.