ERROR opening https://cactus.nci.nih.gov/chemical/structure/c12c%28oc%28c3c%28cc%28O%29cc3%29O%29c%28c1%3DO%29O%29cc%28O%29cc2O/file?format=sdf&get3d=True  -- c12c%28oc%28c3c%28cc%28O%29cc3%29O%29c%28c1%3DO%29O%29cc%28O%29cc2O could not be loaded.