ERROR opening https://cactus.nci.nih.gov/chemical/structure/Fc1ccc%28c%28F%29c1%29C%28O%29%28Cn2ncnc2%29Cn3ncnc3/file?format=sdf&get3d=True  -- Fc1ccc%28c%28F%29c1%29C%28O%29%28Cn2ncnc2%29Cn3ncnc3 could not be loaded.