Kaempferol from the leaves of Apocynum venetum possesses anxiolytic activities in the elevated plus maze test in mice. 【2009】 Grundmann O, Nakajima J, Kamata K, Seo S, Butterweck V.University of Florida, TOKIWA Phytochemical Co., Ltd.Phytomedicine, 16, 295-302. (2009)