ERROR opening https://cactus.nci.nih.gov/chemical/structure/FC%28F%29%28F%29c1cccc%28c1%29-c2cn%28C%29cc%28c2%3DO%29-c3ccccc3/file?format=sdf&get3d=True  -- FC%28F%29%28F%29c1cccc%28c1%29-c2cn%28C%29cc%28c2%3DO%29-c3ccccc3 could not be loaded.