ERROR opening https://cactus.nci.nih.gov/chemical/structure/C%28%3DO%29%5BC%40%40H%5D%28%5BC%40%40H%5D1%5BC%40%40H%5D%20%28%5BC%40%40H%5D%28C%28%3DO%29O1%29O%29O%29O/file?format=sdf&get3d=True -- C%28%3DO%29%5BC%40%40H%5D%28%5BC%40%40H%5D1%5BC%40%40H%5D%20%28%5BC%40%40H%5D%28C%28%3DO%29O1%29O%29O%29O could not be loaded.