ERROR opening https://cactus.nci.nih.gov/chemical/structure/Oc2ccc%28cc2%29%5CC%3DC%5Cc%28c1C%28O%29%3DO%29cccc1O/file?format=sdf&get3d=True  -- Oc2ccc%28cc2%29%5CC%3DC%5Cc%28c1C%28O%29%3DO%29cccc1O could not be loaded.