ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1%3DCC%3DC%28C%3DC1%29P%28%5BC-%5D2C%3DCC%3DC2%29C3%3DCC%3DCC%3DC3%20.C1%3DCC%3DC%28C%3DC1%29P%28%5BC-%5D2C%3DCC%3DC2%29C3%3DCC%3DCC%3DC3.%5BFe%2B2%5D/file?format=sdf&get3d=True  -- C1%3DCC%3DC%28C%3DC1%29P%28%5BC-%5D2C%3DCC%3DC2%29C3%3DCC%3DCC%3DC3%20.C1%3DCC%3DC%28C%3DC1%29P%28%5BC-%5D2C%3DCC%3DC2%29C3%3DCC%3DCC%3DC3.%5BFe%2B2%5D could not be loaded.