A New Diarylheptanoid from the Rhizomes of Alpinia officinarum

A new diarylheptanoid, 4,6-bis (4-hydroxybenzyl)-1,2-dioxepan-5-one, named alpinin E, was isolated from the rhizomes of Alpinia officinarum. The structure of the new compound was elucidated on the basis of 1D and 2D NMR spectra and HR-ESI-MS analysis.