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Molecules 2008, 13(11), 2894-2899; doi:10.3390/molecules13112894

Article

Halogenated Terpenes and a C15-Acetogenin from the Marine Red Alga Laurencia saitoi

Nai-Yun Ji^1,* , Xiao-Ming Li²  and Bin-Gui Wang²

¹ Yantai Institute of Coastal Zone Research for Sustainable Development, Chinese Academy of Sciences, Yantai 264003, P. R. China ² Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, P. R. China

* Author to whom correspondence should be addressed.

Received: 27 October 2008; in revised form: 17 November 2008 / Accepted: 19 November 2008 / Published: 20 November 2008

Download PDF Full-Text [45 KB, uploaded 20 November 2008 10:24 CET]

Abstract: Seven parguerane diterpenes: 15-bromo-2,7,19-triacetoxyparguer-9(11)-en-16-ol (1), 15-bromo-2,7,16,19-tetraacetoxyparguer-9(11)-ene (2), 15-bromo-2,19-diacetoxyparguer-9(11)-en-7,16-diol (3), 15-bromo-2,16,19-triacetoxyparguer-9(11)-en-7-ol (4), 15-bromo-2,16-diacetoxyparguer-9(11)-en-7-ol (5), 15-bromoparguer-9(11)-en-16-ol (6), 15-bromoparguer-7-en-16-ol (7), two polyether triterpenes: thyrsiferol (8) and thyrsiferyl 23-acetate (9), and one C₁₅-acetogenin, neolaurallene (10), were isolated from a sample of marine red alga Laurencia saitoi collected off the coast of Yantai. Their structures were established by detailed NMR spectroscopic analysis and comparison with literature data.

Keywords: Laurencia saitoi; Diterpene; Triterpene; C15-acetogenin

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