ERROR opening https://cactus.nci.nih.gov/chemical/structure/O%3DC%28O%29C%28N%29CC%5BS%20%5D%28C%29C%5BC%40H%5D3O%5BC%40%40H%5D%28n2cnc1c%28ncnc12%29N%29%5BC%40H%5D%28O%29%5BC%40%40H%5D3O/file?format=sdf&get3d=True -- O%3DC%28O%29C%28N%29CC%5BS%20%5D%28C%29C%5BC%40H%5D3O%5BC%40%40H%5D%28n2cnc1c%28ncnc12%29N%29%5BC%40H%5D%28O%29%5BC%40%40H%5D3O could not be loaded.