ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28CC1%3DCC%3DC%28F%29C%3DC1%29N%28C%29CC%23C/file?format=sdf&get3d=True -- CC%28CC1%3DCC%3DC%28F%29C%3DC1%29N%28C%29CC%23C could not be loaded.