Neolignan and lignan glycosides from branch bark of Davidia involucrata.

Two new neolignan glycosides, davidioside A (1) and davidioside B (2), have been isolated along with six known compounds from the branch bark of Davidia involucrata. Identification of their structures was achieved by 1D and 2D NMR experiments, including 1H-1H COSY, NOESY, HMQC, and HMBC methods as well as FAB mass spectral data. [ABSTRACT FROM AUTHOR]