ERROR opening https://cactus.nci.nih.gov/chemical/structure/OC1%28O%29C%28O%29%28O%29C%28O%29%28O%29C%28O%29%28O%29C1%28O%29O/file?format=sdf&get3d=True  -- OC1%28O%29C%28O%29%28O%29C%28O%29%28O%29C%28O%29%28O%29C1%28O%29O could not be loaded.