ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCCC%28C%28%3DO%29OCCN%28CC%29CC%29%28c1ccccc1%29c2ccccc2/file?format=sdf&get3d=True  -- CCCC%28C%28%3DO%29OCCN%28CC%29CC%29%28c1ccccc1%29c2ccccc2 could not be loaded.