Antidepressant effects of apocynum venetum leaves in a forced swimming test. (2001) 【2001】Butterweck V, Nishibe S, Sasaki T, Uchida M.Westfälische Wilhelms-Universität, Health Sciences University of Hokkaido, TOKIWA Phytochemical Co., Ltd.Biol Pharm Bull., 24(7), 848-851. (2001)