ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCN%28CC%29CC%28C%29OC%28%3DO%29%5BC%40H%5D1CCCC%5BC%40%40%5D1%28C2CCCCC2%29O/file?format=sdf&get3d=True  -- CCN%28CC%29CC%28C%29OC%28%3DO%29%5BC%40H%5D1CCCC%5BC%40%40%5D1%28C2CCCCC2%29O could not be loaded.