Physcion and dihydrocarinatin from Aristolochia birostris

摘要

Aristolochia birostris Duchtre (Aristolochiaceae) is a climbing plant found in the Northeastern Brazil, where it is popularly known as 'jarrinha' and 'papo de peru'. The plant material was collected near the city of Santa Rita-Paraiba in March 2001. A voucher specimen (Agra, 4295) is deposited at the Herbarium Prof. Lauro Pires Xavier (JPB) in the Universidade Federal da Paraiba.