ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1%28C%28C%28C%3DCN1CN1CCN%28CC1%29C%29%3DO%29%28CC%29CC%29%3DO/file?format=sdf&get3d=True  -- C1%28C%28C%28C%3DCN1CN1CCN%28CC1%29C%29%3DO%29%28CC%29CC%29%3DO could not be loaded.