 በእነዚህ ምላሾች ውስጥ የበለጠ ንቁ ተሳትፎዎች 4- (1-pyrrolidinyl) pyridine እና 4-dimethylaminopyridine (DMAP) ናቸው, እነሱም የፒሪይን ዘይቤዎች ናቸው.
Ani diẹ sii lọwọ ninu awọn aati wọnyi jẹ 4- (1-pyrrolidinyl) pyridine ati 4-dimethylaminopyridine (DMAP), ti o jẹ awọn itọsẹ pyridine.