ERROR opening https://cactus.nci.nih.gov/chemical/structure/C1%26%2361%3BC%28C%26%2361%3BC%28NC1%26%2361%3BO%29O%29C%28%26%2361%3BO%29O/file?format=sdf&get3d=True -- C1%26%2361%3BC%28C%26%2361%3BC%28NC1%26%2361%3BO%29O%29C%28%26%2361%3BO%29O could not be loaded.