请高手帮忙分析H-NMR谱

franks

这是一个天然产物的HNMR，可能结构如附件3所示，请高手帮忙分析下，不胜感激！

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[此贴子已经被作者于2009-3-1 9:32:42编辑过]

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celan

属于abietane型二萜估计没什么问题，按楼主提出的结构式应该是鼠李草酚Carnosol，可与文献数据对照即可，请注意与isocarnosol的区别。

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图谱测的挺好！

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我帮您找了点文献供参考。

[此贴子已经被作者于2009-3-1 15:50:31编辑过]

celan

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Agricultural and Biological Chemistry
	Vol.46 , No.6(1982)pp.1661-1666

 

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Structure of a New Antioxidative Phenolic Diterpene Isolated from Rosemary (Rosmarinus officinalis L.)
	Reiko INATANI1), Hidetsugu FUWA1), Haruo SETO2) and Nobuji NAKATANI1)
	( M2 ]/ C$ ]/ \% o+ ~2 p 1) Department of Food and Nutrition, Faculty of Science of Living, Osaka City University # G$ M3 U) G% `, T 2) Institute of Applied Microbiology, The University of Tokyo
	[Received: 1982/02/01]
	[Released: 2006/03/27]
	Abstract:
	A new antioxidant, phenolic diterpene, named rosmanol, was isolated from the leaves of rosemary (Rosmarinus officinalis L.). Its structure has been determined as 7β, 11, 12-trihydroxy-6, 10-(epoxymethano)abieta-8, 11, 13-trien-20-one on the basis of chemical and spectroscopic evidence. In addition, all the protons of rosmanol (II) as well as carnosol (I), including the methylene protons of the A ring, were analyzed by 400 MHz 1H-NMR.

人中疯

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