ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1%3DC3C%28%3DCC%3DC1CC%28C%29NCC2%3DCC%3DCC%3DC2%29OCO3/file?format=sdf&get3d=True  -- C1%3DC3C%28%3DCC%3DC1CC%28C%29NCC2%3DCC%3DCC%3DC2%29OCO3 could not be loaded.