ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%28Nc1ccc%28cc1%29C%28F%29%28F%29F%29c2c%28onc2%29C/file?format=sdf&get3d=True  -- O%3DC%28Nc1ccc%28cc1%29C%28F%29%28F%29F%29c2c%28onc2%29C could not be loaded.