Nikolay Yakovlevich Demyanov (Russian: ??????´? ?´???????? ?????´???; March 27 [O.S.
March 15] 1861, Tver – March 19, 1938, Moscow), also known as Demjanov and Demjanow, was a Russian organic chemist and a member of the USSR Academy of Sciences (1929).
He is internationally known for the Demjanov rearrangement organic reaction and other discoveries.
He was a recipient of the Lenin Prize in 1930.