ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC1NC%28%3DO%29SC1Cc3ccc%28OCCN%28c2ncccc2%29C%29cc3/file?format=sdf&get3d=True  -- O%3DC1NC%28%3DO%29SC1Cc3ccc%28OCCN%28c2ncccc2%29C%29cc3 could not be loaded.