ERROR opening https://cactus.nci.nih.gov/chemical/structure/N%5BC%40H%5D%28C%28%3DO%29O%29c1cc%28O%29no1/file?format=sdf&get3d=True  -- N%5BC%40H%5D%28C%28%3DO%29O%29c1cc%28O%29no1 could not be loaded.