139194-05-1 N,N'-Bis(dimethylamidofluoromethylphosphonite)-diaza-18-crown-6 diiodide Phosphorus(1+), mu-1,4,10,13-tetraoxa-7,16-diazacyclooctadecane-7,16-diyldifluorobis(N-methylmethanaminato)dimethyl-, diiodide