ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1ccc%28cc1%29C2C%28%3DO%29c3ccc%28cc3C2%3DO%29Br/file?format=sdf&get3d=True  -- c1ccc%28cc1%29C2C%28%3DO%29c3ccc%28cc3C2%3DO%29Br could not be loaded.