ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC1%3DNN%3DC2CN%3DC%28C3%3DNC%3DCC%3DC3%29C3%3DCC%28Br%29%3DCC%3DC3N12/file?format=sdf&get3d=True -- CC1%3DNN%3DC2CN%3DC%28C3%3DNC%3DCC%3DC3%29C3%3DCC%28Br%29%3DCC%3DC3N12 could not be loaded.