ERROR opening https://cactus.nci.nih.gov/chemical/structure/C%5BC%40%40H%5D%28%5BC%40%40H%5D%28c1ccccc1%29O%29NCCC%28%3DO%29c2cccc%28c2%29OC/file?format=sdf&get3d=True  -- C%5BC%40%40H%5D%28%5BC%40%40H%5D%28c1ccccc1%29O%29NCCC%28%3DO%29c2cccc%28c2%29OC could not be loaded.