HPLC fingerprint of stems and leaves of Trollius chinensis HPLC fingerprint of stems and leaves of Trollius chinensis Dynamic changes of total flavonoids and orientin from stems and leaves of Trollius chinensis at different collecting periods Dynamic changes of total flavonoids and orientin from stems and leaves of Trollius chinensis at different collecting periods Effects of vitexin on cell growth and apoptosis of human esophageal cancer EC-109 cells Effects of vitexin on cell growth and apoptosis of human esophageal cancer EC-109 cells