HBPYU;(BENZOTRIAZOL-1-YLOXY)DIPYRROLIDINOCARBENIUM HEXAFLUOROPHOSPHATE;O-(BENZOTRIAZOL-1-YL)-N,N,N',N'-BIS(TETRAMETHYLENE)URONIUM HEXAFLUOROPHOSPHATE;O-BENZOTRIAZOL-1-YL-N N N' N'-BIS(TETRA&;O-(Benzotriazol-1-yl)-N,N,N',N'-bis(tetramethylene;HBPyUO-(Benzo
