ERROR opening https://cactus.nci.nih.gov/chemical/structure/FC%28F%29%28F%29c2nc%28c%28c1ccc%28OC%29cc1%29n2%29c3ccc%28OC%29cc3/file?format=sdf&get3d=True  -- FC%28F%29%28F%29c2nc%28c%28c1ccc%28OC%29cc1%29n2%29c3ccc%28OC%29cc3 could not be loaded.