Citation: Da Yong SHI, Li Jun HAN, Jie SUN, Shuai LI, Su Juan WANG, Yong Chun YANG, Xiao FAN, Jian Gong SHI. A New Halogenated Biindole and A New Apo-carotenone from Green Alga Chaetomorpha basiretorsa Setchell[J]. Chinese Chemical Letters, ;2005, 16(6): 777-780. shu

A New Halogenated Biindole and A New Apo-carotenone from Green Alga Chaetomorpha basiretorsa Setchell

Da Yong SHI ^1,3, ,
Li Jun HAN ¹ ,
Jie SUN ^1,3 ,
Shuai LI ² ,
Su Juan WANG ² ,
Yong Chun YANG ² ,
Xiao FAN ¹ ,
Jian Gong SHI ²

1.
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071;
2.
Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050;
3.
Graduate School of the Chinese Academy of Sciences, Beijing 100039

Received Date: 21 January 2004

Fund Project: This work was financial supported by national 863 project (Grant No. 2004AA625030, 2001AA620503), NNSFC (Grant No.20432030), and Key Innovative Project of the Academy (Grant No. KZCX3-SW-215).

A new halogenated biindole and a new apo-carotenone have been isolated from the ethanolic extract of the green alga Chaetomorpha basiretorsa Sethcell. On the basis of chemical and spectroscopic methods including 2D NMR technique, their structures have been elucidated as 4,4'-dichloro-5,5'-dibromo-7,7'-dimethoxy-2,2'-bi-1H-indole and l'S^*,4'R^*-8-(4'-hydroxy-2',6',6'-trimethylcyclohex-2-enyl)-6-methyloct-3E,5E,7E-trien-2-one, respectively.
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