ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1%28ccc%28C%28O%2A%29%3DO%29cc1%29C%28OCCCCO%2A%29%3DO/file?format=sdf&get3d=True  -- c1%28ccc%28C%28O%2A%29%3DO%29cc1%29C%28OCCCCO%2A%29%3DO could not be loaded.