Natural product inhibitors of the angiotensin converting enzyme (ACE). A review between 1980–2000 - Barbosa-Filho, J M; Martins, V KM; Rabelo, L A; Moura, M D; Silva, M S; Cunha, E VL; Souza, M FV; Almeida, R M; Medeiros, I A (Rev Bras Farmacogn, 2006)