ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1ccc%28cc1%29C2C%28C%28C2C%28%3DO%29O%29C%28%3DO%29O%29c3ccccc3/file?format=sdf&get3d=True  -- c1ccc%28cc1%29C2C%28C%28C2C%28%3DO%29O%29C%28%3DO%29O%29c3ccccc3 could not be loaded.