ERROR opening https://cactus.nci.nih.gov/chemical/structure/CNC%5BC%40H%5D%28O%29C1%3DCC%3DC%28O%29C%28O%29%3DC1/file?format=sdf&get3d=True -- CNC%5BC%40H%5D%28O%29C1%3DCC%3DC%28O%29C%28O%29%3DC1 could not be loaded.