ERROR opening https://cactus.nci.nih.gov/chemical/structure/CCC%28CC1%3DCNC2%3DC1C%3DC%28C%3DC2%29F%29N/file?format=sdf&get3d=True  -- CCC%28CC1%3DCNC2%3DC1C%3DC%28C%3DC2%29F%29N could not be loaded.