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