ERROR opening https://cactus.nci.nih.gov/chemical/structure/IC1%3DC%28C%23N%29NC2%3DCC%3DCC%28OCC%28CNC%28C%29%28C%29C%29O%29%3DC21/file?format=sdf&get3d=True -- IC1%3DC%28C%23N%29NC2%3DCC%3DCC%28OCC%28CNC%28C%29%28C%29C%29O%29%3DC21 could not be loaded.