ERROR opening https://cactus.nci.nih.gov/chemical/structure/C%28%5BC%40%40H%5D%28C%28%3DO%29%5BO-%5D%29%5BNH3%2B%5D%29C%28%3DO%29N/file?format=sdf&get3d=True -- C%28%5BC%40%40H%5D%28C%28%3DO%29%5BO-%5D%29%5BNH3%2B%5D%29C%28%3DO%29N could not be loaded.