139194-06-2 BRN 5461580 N,N'-Bis(dimethylamidofluorophosphonite)-diaza-18-crown-6 difluoride Phosphoranediamine, 1,1'-(1,4,10,13-tetraoxa-7,16-diazacyclooctadecane-7,16-diyl)bis(1,1-difluoro-N,N,N',N'-tetramethyl-