ERROR opening https://cactus.nci.nih.gov/chemical/structure/CN1N%3DCN%3DC1COC4%3DNN2C%28C%3DC4C%28C%29%28C%29C%29%3DNN%3DC2C3%3DCC%28F%29%3DCC%3DC3F/file?format=sdf&get3d=True  -- CN1N%3DCN%3DC1COC4%3DNN2C%28C%3DC4C%28C%29%28C%29C%29%3DNN%3DC2C3%3DCC%28F%29%3DCC%3DC3F could not be loaded.