ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1ccc2c%28c1%29cc3ccc4c5ccccc5cc6c4c3c2cc6/file?format=sdf&get3d=True  -- c1ccc2c%28c1%29cc3ccc4c5ccccc5cc6c4c3c2cc6 could not be loaded.