ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCOC%28%3DO%29C%28CCN1CCOCC1%29%28c1ccccc1%29c1ccccc1/file?format=sdf&get3d=True  -- CCOC%28%3DO%29C%28CCN1CCOCC1%29%28c1ccccc1%29c1ccccc1 could not be loaded.