Chemical studies on the cecropiaceae: A novel a-ring seco triterpene from musanga cecropioides

A novel A-ring seco pentacyclic triterpene has been isolated from the stem bark of Musanga cecropioides, as well as the known oleanolic and ursolic acids, 2a-hydroxy oleanolic and ursolic acids, benthamic acid, 3-rhamnosyl benthamic acid, and tormentic acid, all as their methyl esters. The new triterpene has been characterized by spectroscopic methods as methyl 16a, 19a-dihydroxy-2,3-secours-12-ene-2,3,28-trioate [3]. The isolation of the known compounds is also described. © 1989, American Chemical Society. All rights reserved.