ERROR opening https://cactus.nci.nih.gov/chemical/structure/O1CCN%28C%28C%29C%29CC1c2cc%28C%28F%29%28F%29F%29ccc2/file?format=sdf&get3d=True  -- O1CCN%28C%28C%29C%29CC1c2cc%28C%28F%29%28F%29F%29ccc2 could not be loaded.