ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN%28C%29P%28%26%2361%3BO%29%28N%28C%29C%29N%28C%29C/file?format=sdf&get3d=True  -- CN%28C%29P%28%26%2361%3BO%29%28N%28C%29C%29N%28C%29C could not be loaded.