ERROR opening https://cactus.nci.nih.gov/chemical/structure/O1C%28C%28C%28C1%3DO%29%2A%29%2A%29%2A/file?format=sdf&get3d=True  -- O1C%28C%28C%28C1%3DO%29%2A%29%2A%29%2A could not be loaded.