ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1C%5BC%40%40H%5D2CN%28C%28%3DO%29C3%3DC2C%28%3DCC%3DC3%29C1%29%5BC%40%40H%5D4CN5CCC4CC5/file?format=sdf&get3d=True  -- C1C%5BC%40%40H%5D2CN%28C%28%3DO%29C3%3DC2C%28%3DCC%3DC3%29C1%29%5BC%40%40H%5D4CN5CCC4CC5 could not be loaded.