ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%28OC1CC2N%28C%28C1%29C3OC23%29C%29C%28O%29%28c4ccccc4%29CO/file?format=sdf&get3d=True  -- O%3DC%28OC1CC2N%28C%28C1%29C3OC23%29C%29C%28O%29%28c4ccccc4%29CO could not be loaded.