Rapid isolation and identification of minor natural products by LC-MS, LC-SPE-NMR and ECD: isoflavanones, biflavanones and bisdihydrocoumarins from Ormocarpum kirkii - Xu, Y J; Foubert, K; Dhooghe, L; Lemière, F; Maregesi, S; Coleman, C M; Zou, Y; Ferreira, D; Apers, S; Pieters, L (Phytochemistry, 2012)