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