1-(Chloro-1-pyrrolidinylmethylene)pyrrolidinium tetrafluoroborate115007-14-2100 % similar 1-(Chloro-1-pyrrolidinylmethylene)pyrrolidinium hexafluorophosphate135540-11-368 % similar Chlorodipiperidinocarbenium hexafluorophosphate161308-40-366 % similar Bis(tetramethylene)fluoroformamidinium hexafluorophosphate164298-25-339 % similar N,N,N',N'-Bis(tetramethylene)-O-(N-succinimidyl)uronium Hexafluorophosphate207683-26-930 % similar 1-Pyrrolidinecarbonyl chloride1192-63-830 % similar