Denitroaristolochic Acids from the Leaves of Aristolochia cucurbitifolia HAYATA.

Abstract

Seven denitroaristolochic acids, incuding four new compounds, sodium aristofolin-A, aristofolin-B-D and three known compounds, aristofolin-A, aristolic acid and methyl aristolate were isolated from the leaves of Aristolochia cucurbitifolia. Their structures were determined by spectroscopic methods.