ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1%28c%28c%28c2c%28o1%29cc%28cc2OC%29O%29%3DO%29O%29c1cc%28c%28cc1%29O%29O/file?format=sdf&get3d=True  -- c1%28c%28c%28c2c%28o1%29cc%28cc2OC%29O%29%3DO%29O%29c1cc%28c%28cc1%29O%29O could not be loaded.