PyBroP132705-51-2100 % similar Chlorotri(1-pyrrolidinyl)phosphonium hexafluorophosphate133894-48-154 % similar Bromotris(dimethylamino)phosphonium hexafluorophosphate50296-37-246 % similar Bis(tetramethylene)fluoroformamidinium hexafluorophosphate164298-25-333 % similar PyBOP128625-52-532 % similar 1-(Chloro-1-pyrrolidinylmethylene)pyrrolidinium hexafluorophosphate135540-11-331 % similar Chlorodipiperidinocarbenium hexafluorophosphate161308-40-331 % similar Hexafluorophosphoric acid16940-81-130 % similar