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