ERROR opening https://cactus.nci.nih.gov/chemical/structure/NC%5BC%40H%5D%28O%29c1cc%28O%29c%28O%29cc1/file?format=sdf&get3d=True  -- NC%5BC%40H%5D%28O%29c1cc%28O%29c%28O%29cc1 could not be loaded.