HPLC-CD on-line coupling in combination with HPLC-NMR and HPLC-MS/MS for the determination of the full absolute stereostructure of new metabolites in plant extracts - Bringmann,G.; Messer,K.; Wohlfarth,M.; Kraus,J.; Dumbuya,K.; Rückert,M. (Anal Chem, 1999)