Diterpene esters of aristolochic acids from Aristolochia pubescens
From the acetone and ethanol extracts of the tubercula of Aristolochia pubescens, two diterpene esters of aristolochic acids were isolated, together with 23 known compounds. The structures of the compounds were determined on the basis of spectroscopic analysis. Two diterpene esters of aristolochic acids, along with 23 other known compounds, were isolated from the tubercula of Aristolochia pubescens. Their structures were established by spectroscopic analysis.