What is "ketol"

Ketol \Ke"tol\ (k[=e]"t[=o]l), n. [Ketone + indol.] (Chem.) One of a series of series of complex nitrogenous substances, represented by methyl ketol and related to indol.

Methyl ketol, a weak organic base, obtained as a white crystalline substance having the odor of f[ae]ces.

n. (context organic chemistry English) acyloin