Two New Diterpenes from Helianthus annuus L.

• Mao Rong SUO ^1, ,
• Jun Shan YANG ^1, ,
• Yang LU ^2, ,
• Li WU ^2, ,
• Qi Tai ZHENG ^2,

• 1.

  Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100094;

• 2.

  Institute of Medicinal Materia, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050

• Received Date: 23 May 2005
  
• Fund Project:

  The research was supported by the National Natural Science Foundation of China (No 20432030), and we are grateful for professor Wen Yi HE of (Institute of Materia Medica, Chinese Academy of the Medica Sciences and Perking Union Medical College) for NMR data.