ERROR opening https://cactus.nci.nih.gov/chemical/structure/C%28C%28%2A%29%28F%29F%29%28%2A%29%28F%29F/file?format=sdf&get3d=True -- C%28C%28%2A%29%28F%29F%29%28%2A%29%28F%29F could not be loaded.