ERROR opening https://cactus.nci.nih.gov/chemical/structure/C%28%5BC%40%40H%5D%28CC%29C%29OC%28C%29%3DO/file?format=sdf&get3d=True  -- C%28%5BC%40%40H%5D%28CC%29C%29OC%28C%29%3DO could not be loaded.