Abstract
 1. INTRODUCTION
 2. MATERIALS AND METHODS
  2.1 Chemical analysis of the extracts
  2.2 MIT Antitumor activity assay
 3.RESULT
  3.1 Chemical composition of PEIO
  3.2 Cytotoxicities of PEIO
 4. DISCUSSION

• Ji Feng(Key laboratory on biotechnology for medicinal plants, Xuzhou 221116, Jiangsu China & China University of Mining and Technology, Xuzhou 221009, Jiangsu China)
• Zheng Weifa( Key laboratory on biotechnology for medicinal plants, Xuzhou 221116, Jiangsu China) | Zheng Weifa
• liu liang( Key laboratory on biotechnology for medicinal plants, Xuzhou 221116, Jiangsu China & Anhui Normal University, Wuhu 241000, Anhui China) | liu liang
• Peng yecheng( Key laboratory on biotechnology for medicinal plants, Xuzhou 221116, Jiangsu China & China University of Mining and Technology, Xuzhou 221009, Jiangsu China) | Peng yecheng
• Zong Zhimin( China University of Mining and Technology, Xuzhou 221009, Jiangsu China) | Zong Zhimin