ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCOC%28%3DO%29C%28CCc1ccccc1%29NC1CCCN2CCCC%28N2C1%3DO%29C%28O%29%3DO/file?format=sdf&get3d=True  -- CCOC%28%3DO%29C%28CCc1ccccc1%29NC1CCCN2CCCC%28N2C1%3DO%29C%28O%29%3DO could not be loaded.