Cytotoxic and Antioxidative Sesquiterpenoids from Heterotheca inuloides - Kubo, Isao; Chaudhuri, Swapan K; Kubo, Yumi; Sanchez, Yolanda; Ogura, Tetsuya; Saito, Takashi; Ishikawa, Harumi; Haraguchi, Hiroyuki (Planta Medica, 1996)