N'afọ 1924, onye Russia bụ Aleksei Chichibabin mepụtara pyridine synthesis reaction, nke dabeere na reagents dị ọnụ ala. A ka na-eji usoro a eme ihe maka mmepụta ụlọ ọrụ nke pyridine. Ajụjụ: Gịnị bụ aha onye Russia na-emepụta ọgwụ?
Aleksei Chichibabin