Antinociceptive Constituents of Auricularia polytricha - Koyama, Kiyotaka; Akiba, Michiko; Imaizumi, Tooru; Kinoshita, Kaoru; Takahashi, Kunio; Suzuki, Akira; Yano, Shingo; Horie, Syunji; Watanabe, Kazuo (Planta Medica, 2002)