A New Anti-Oedematogenic Nor-pregnane Derivative Isolated from Mandevilla illustris - Niero, Rivaldo; Alves, Ricardo Vieira; Filho, Valdir Cechinel; Calixto, João Batista; Hawkes, Jane E; Sant’Ana, Antonio Euzébio Goulart; Yunes, Rosendo Augusto (Planta Medica, 2002)