ERROR opening https://cactus.nci.nih.gov/chemical/structure/c1cc%28c%28cc1C%28%3DC2C%3DCC%28%3DO%29C%28%3DC2%29C%28%3DO%29O-%29c3ccc%28c%28c3%29C%28%3DO%29O-%29O%29C%28%3DO%29O-%29O.NH4%20.NH4%20.NH4%20/file?format=sdf&get3d=True -- c1cc%28c%28cc1C%28%3DC2C%3DCC%28%3DO%29C%28%3DC2%29C%28%3DO%29O-%29c3ccc%28c%28c3%29C%28%3DO%29O-%29O%29C%28%3DO%29O-%29O.NH4%20.NH4%20.NH4%20 could not be loaded.