ERROR opening https://cactus.nci.nih.gov/chemical/structure/COc1cc%28OC%28F%29F%29cc%28c1CC%28N%29C%29OC/file?format=sdf&get3d=True  -- COc1cc%28OC%28F%29F%29cc%28c1CC%28N%29C%29OC could not be loaded.