The mass spectrometric characteristics of the pterocarpan skeleton have bee
n studied with the aid of metastable decomposition (CAD-MIKES), high resolu
tion mass measurements and specific deuterium labeling, New structural rota
tions have been postulated for the [M - H](+) ions which can explain the fr
agmentation routes for the pterocarpan skeleton. Copyright (C) 2000 John Wi
ley & Sons, Ltd.