β2-Adrenoceptor-Mediated Tracheal Relaxation Induced by Higenamine from Nandina domestica Thunberg - Tsukiyama, Muneo; Ueki, Takuro; Yasuda, Yoichi; Kikuchi, Hiroko; Akaishi, Tatsuhiro; Okumura, Hidenobu; Abe, Kazuho (Planta Medica, 2009)