ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28C%28%3DO%29O%29c1ccc%28CC%28C%29C%29cc1/file?format=sdf&get3d=True -- CC%28C%28%3DO%29O%29c1ccc%28CC%28C%29C%29cc1 could not be loaded.