@article{article08ca849c,
title   = {Structure of a triterpene extracted from austroplenckia populnea (celastraceae), methyl 3-oxofriedelan-20-'ALFA'-oate},
author = {Cota, A B and Mascarenhas, Yvonne Primerano and Silva, G D F and Souza, J R},
year = {1990},
doi = {10.1107/S010827018900911X},
journal   = {Acta Crystallographica C}
}