ERROR opening https://cactus.nci.nih.gov/chemical/structure/%26%2391%3BB-%26%2393%3B%28F%29%28F%29%28F%29F.%26%2391%3BK%2B%26%2393%3B/file?format=sdf&get3d=True -- %26%2391%3BB-%26%2393%3B%28F%29%28F%29%28F%29F.%26%2391%3BK%2B%26%2393%3B could not be loaded.