ERROR opening https://cactus.nci.nih.gov/chemical/structure/Cc1c%5BnH%5Dc%28%3DO%29%5BnH%5Dc1%3DO/file?format=sdf&get3d=True  -- Cc1c%5BnH%5Dc%28%3DO%29%5BnH%5Dc1%3DO could not be loaded.