ERROR opening https://cactus.nci.nih.gov/chemical/structure/CC%28%3DCCOP%28%3DO%29%28O-%29OP%28%3DO%29%28O-%29O-%29CO/file?format=sdf&get3d=True  -- CC%28%3DCCOP%28%3DO%29%28O-%29OP%28%3DO%29%28O-%29O-%29CO could not be loaded.