2-Chloro-1,3-bis(dimethylamino)trimethinium hexafluorophosphate249561-98-6100 % similar 2-Chloro-1,3-bis(dimethylamino)trimethinium hexafluorophosphate291756-76-8100 % similar Chloro-N,N,N',N'-tetramethylformamidinium Hexafluorophosphate94790-35-938 % similar