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