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