Tobacco Chemistry. 66. (5R,6S,7E,9S)-7-Megastigmene-5,6,9-triol, a New Constituent of Greek Tobacco.

Abstract
A new tobacco constituent has been isolated from tobacco and is shown to be (5R,6S,7E,9S)-7-Megastigmene-5,6,9-triol by spectral methods, X-ray analysis of the corresponding 9R-epimer, and asymmetric synthesis. The biogenesis of the new compound is discussed.