duocrinin

du·o·crin·in

(dū'ō-krin'in),
A postulated gastrointestinal hormone that is liberated by the contact of gastric contents with the intestine and that stimulates the secretory activity of the duodenal glands (Brunner glands).
[duodenum + G. krinō, to secrete, + -in]

duocrinin

Uncertain; a “hormone” released when the gastric content arrived in the duodenum, stimulating Brunner's glandular activity; possibly secretin.