ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN%28C%29CC%28C%28C1%3DCC%3DCC%3DC1%29C2%3DCC%28%3DCC%3DC2%29Cl%29O/file?format=sdf&get3d=True -- CN%28C%29CC%28C%28C1%3DCC%3DCC%3DC1%29C2%3DCC%28%3DCC%3DC2%29Cl%29O could not be loaded.