ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCCCCCC%28C%29%28C%29c%28cc1OC%29cc%28OC2%28C%29C%29c1C3C2CCC%28%3DC%29C3/file?format=sdf&get3d=True  -- CCCCCCC%28C%29%28C%29c%28cc1OC%29cc%28OC2%28C%29C%29c1C3C2CCC%28%3DC%29C3 could not be loaded.