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