ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCOC%28%3DO%29C23Oc1ccccc1%5CC%28%3DN%5CO%29%5CC2C3/file?format=sdf&get3d=True  -- CCOC%28%3DO%29C23Oc1ccccc1%5CC%28%3DN%5CO%29%5CC2C3 could not be loaded.