ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC1NC%28%3DO%29SC1Cc3ccc%28OCCc2ncc%28cc2%29CC%29cc3/file?format=sdf&get3d=True  -- O%3DC1NC%28%3DO%29SC1Cc3ccc%28OCCc2ncc%28cc2%29CC%29cc3 could not be loaded.