ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC2OCC%28%3DC2%5Cc1ccccc1%29%5Cc3ccc%28cc3%29S%28%3DO%29%28%3DO%29C/file?format=sdf&get3d=True  -- O%3DC2OCC%28%3DC2%5Cc1ccccc1%29%5Cc3ccc%28cc3%29S%28%3DO%29%28%3DO%29C could not be loaded.