UPLC/TOF-MS methodology for the on-line identification of secondary metabolites in four Scleria species (Cyperaceae): S. striatonux, S. verrucosa, S. boivinii and S. naumaniana - Nyongbela, KD; Ndjoko Ioset, K; Brun, R; Wittlin, S; Hoye, TR; Nelson, D; NgoHanna, J; McAkam, T; Mbah, JA; Makolo, FL; Wirmum, C; Efange, SM; Hostettmann, K (Planta Medica, 2009)