Noun
pyruvoyl (plural pyruvoyls)
(organic chemistry, especially in combination) The univalent radical derived from pyruvic acid by loss of a hydroxyl group
This pyruvoyl group may be used as a covalently attached catalytic cofactor in some enzymes, especially decarboxylases such as S-adenosylmethionine decarboxylase (SAMDC) that exploit the electron-withdrawing power of the pyruvoyl group. Source: Internet