ERROR opening https://cactus.nci.nih.gov/chemical/structure/FC%28F%29%28F%29COc2cc%28C%28%3DO%29NCC1NCCCC1%29c%28OCC%28F%29%28F%29F%29cc2/file?format=sdf&get3d=True  -- FC%28F%29%28F%29COc2cc%28C%28%3DO%29NCC1NCCCC1%29c%28OCC%28F%29%28F%29F%29cc2 could not be loaded.