X-Ray Crystallographic Studies on the Structure of Alnuserrudiolone Isolated from the Male Flowers of Alnus serrulatoides

Abstract
The structure of alnuserrudiolone was corroborated to be (12R,20S)-12,20-dihydroxy-24-methylenedammaran-3-one by the X-ray crystallography together with the 13C NMR and the high resolution mass spectral measurements.