ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%28OC%29CCc1ccc%28OCC%28O%29CNC%28C%29C%29cc1/file?format=sdf&get3d=True  -- O%3DC%28OC%29CCc1ccc%28OCC%28O%29CNC%28C%29C%29cc1 could not be loaded.