Antioxidant Activity of Curtisians I - L from the Inedible Mushroom Paxillus curtisii - Quang, Dang Ngoc; Hashimoto, Toshihiro; Nukada, Makiko; Yamamoto, Isao; Tanaka, Masami; Asakawa, Yoshinori (Planta Medica, 2003)