ERROR opening https://cactus.nci.nih.gov/chemical/structure/C%5CC%28%3DC/c1ccccc1%29%5C%5BN%2B%5D%28%3DO%29%5BO-%5D/file?format=sdf&get3d=True -- C%5CC%28%3DC/c1ccccc1%29%5C%5BN%2B%5D%28%3DO%29%5BO-%5D could not be loaded.