ERROR opening https://cactus.nci.nih.gov/chemical/structure/B1%28OB%28OB%28O1%29C%3DC%29C%3DC%29C%3DC/file?format=sdf&get3d=True -- B1%28OB%28OB%28O1%29C%3DC%29C%3DC%29C%3DC could not be loaded.