ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%28O%29CCc2ccc%28cc2%29OC%28%3DO%29C1CCC%28CN%29CC1/file?format=sdf&get3d=True  -- O%3DC%28O%29CCc2ccc%28cc2%29OC%28%3DO%29C1CCC%28CN%29CC1 could not be loaded.