ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28C%29C%28C%29C%3DCC%28C%29C1CCC2C1%28CCCC2%3DCC%3DC3CC%28CCC3%3DC%29O%29C/file?format=sdf&get3d=True  -- CC%28C%29C%28C%29C%3DCC%28C%29C1CCC2C1%28CCCC2%3DCC%3DC3CC%28CCC3%3DC%29O%29C could not be loaded.