ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN1C%28%3DO%29CN%3DC%28c2ccccc2F%29c2cc%28%5BN%2B%5D%28%3DO%29%5BO-%5D%29ccc21/file?format=sdf&get3d=True -- CN1C%28%3DO%29CN%3DC%28c2ccccc2F%29c2cc%28%5BN%2B%5D%28%3DO%29%5BO-%5D%29ccc21 could not be loaded.