Fluorescent Pigment and Phenol Glucosides from the Heartwood of <i>Pterocarpus marsupium</i>

Abstract

The fluorescence shown by extracts of the heartwood of <i>Pterocarpus marsupium</i> is attributed to salts of the new compound <b>1</b>, whose structure was elaborated using detailed spectroscopic/spectrometric studies. The plant material also contains the nonfluorescent compounds <b>2</b> and <b>3</b>. The absolute configuration of <b>1</b> was determined by experimental and theoretically calculated electronic CD spectra, while that of <b>3</b> was deduced from ECD comparison with reported results in the α-hydroxydihydrochalcone series