Spiranthenones A and B, Tetraprenylated Phloroglucinol Derivatives from the Leaves of Spiranthera odoratissima - Albernaz, Lorena Carneiro; Deville, Alexandre; Dubost, Lionel; de Paula, José Elias; Bodo, Bernard; Grellier, Philippe; Espindola, Laila Salmen; Mambu, Lengo (Planta Medica, 2012)