ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%3DC1C%28C%28%3DO%29N%3DC1C%3DC2C%28%3DC%28C%28%3DCC3%3DC%28C%28%3DC%28N3%29CC4C%28%3DC%28C%28%3DO%29N4%29C%3DC%29C%29C%29CCC%28%3DO%29O%29N2%29CCC%28%3DO%29O%29C%29C/file?format=sdf&get3d=True -- CC%3DC1C%28C%28%3DO%29N%3DC1C%3DC2C%28%3DC%28C%28%3DCC3%3DC%28C%28%3DC%28N3%29CC4C%28%3DC%28C%28%3DO%29N4%29C%3DC%29C%29C%29CCC%28%3DO%29O%29N2%29CCC%28%3DO%29O%29C%29C could not be loaded.