ERROR opening https://cactus.nci.nih.gov/chemical/structure/FC%28F%29%28F%29c1cccc2c%28ccnc12%29Nc3ccccc3C%28%3DO%29OCC%28O%29CO/file?format=sdf&get3d=True  -- FC%28F%29%28F%29c1cccc2c%28ccnc12%29Nc3ccccc3C%28%3DO%29OCC%28O%29CO could not be loaded.