Two new xanthones from Swertia angustifolia

Abstract Two new xanthones, angustins A and B (1 and 2), were isolated from the aerial parts of Swertia angustifolia together with six known compounds (3–8). The structures of these two xanthones were elucidated by extensive analysis of the spectroscopic data. In addition, compounds 3 and 6–8 were isolated from this plant for the first time. Keywords: Swertia angustifolia xanthoneangustin Aangustin B Acknowledgements This study was financially supported by CNTC under contract number 110201001006, and Natural Product Library Program of BioBioPha.