ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCCCCCC%28C%29%28C%29C1%3DCC%28%3DC%28C%28%3DC1%29O%29C2CCCCCC2%29O/file?format=sdf&get3d=True  -- CCCCCCC%28C%29%28C%29C1%3DCC%28%3DC%28C%28%3DC1%29O%29C2CCCCCC2%29O could not be loaded.