ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%28OC%29Nc3nc2ccc%28Sc1ccccc1%29cc2n3/file?format=sdf&get3d=True  -- O%3DC%28OC%29Nc3nc2ccc%28Sc1ccccc1%29cc2n3 could not be loaded.