ERROR opening https://cactus.nci.nih.gov/chemical/structure/Oc1ccc%28cc1%29%5CC%3DC%5Cc2cc%28O%29cc%28O%29c2/file?format=sdf&get3d=True  -- Oc1ccc%28cc1%29%5CC%3DC%5Cc2cc%28O%29cc%28O%29c2 could not be loaded.