A new disaccharoside (2) together with a known disaccharose (1) was isolated from the ethanol extract of Camptosorus sibiricus Rupr. By means of chemical (hydrolysis) and spectroscopic methods (IR, 1D and 2D NMR, ESI-MS), the structures were established as beta-D-glucopyranosyl (1 -->
BACKGROUND
Camptosorus sibiricus Rupr (CSR) is a widely used herbal medicine with antivasculitis, antitrauma, and antitumor effects. However, the effect of CSR aqueous extract on B[a]P-initiated tumorigenesis and the underlying mechanism remain unclear. Moreover, the compounds in CSR aqueous extract