 በእነዚህ ምላሾች ውስጥ የበለጠ ንቁ ተሳትፎዎች 4- (1-pyrrolidinyl) pyridine እና 4-dimethylaminopyridine (DMAP) ናቸው, እነሱም የፒሪይን ዘይቤዎች ናቸው.
Eyona nto isebenzayo kule mpendulo i-4- (1-pyrrolidinyl) pyridine kunye ne-4-dimethylaminopyridine (i-DMAP), eyimveliso ye-pyridine.