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