Identification of C-glycosyl flavones and O-glycosyl flavones in five Dendrobium species by high-performance liquid chromatography coupled with electrospray ionization multi-stage tandem MS.

The results of this study may be useful for the quality assessment and for the application of D. crystallinum, D. falconeri, D. strongylanthum, D. moniliforme, and D. gratiosissimum. This study provides comprehensive information for identification of flavones from other Chinese herbs.