New Cytotoxic Cyclobutanoid Amides, a New Furanoid Lignan and Anti-Platelet Aggregation Constituents from Piper arborescens - Tsai, Ian-Lih; Lee, Fan-Pin; Wu, Chin-Chung; Duh, Chang-Yih; Ishikawa, Tsutomu; Chen, Jih-Jung; Chen, Yu-Chang; Seki, Hiroko; Chen, Ih-Sheng (Planta Medica, 2005)