An NMR Study of Lasiodonin Acetonide

Abstract

Abstract:

A new diterpene，lasiodonin acetonide，was isolated from Chinese medicinal herb Rabdosia rubescens (Hems L.). Referring to the ¹H and ¹³C NMR spectra of lasiodonin，maoecrystal T，wikstroemioidin B and rabdocoetsin A，its structure was determined to be 1α，6β，7β，11β-tetrahydroxy-cyclic，1，11-(1-methyl- ethylidene acetal)-7，20-epoxy- Kaur-16-en-15-one by 1D (¹H，¹³C NMR and DEPT) and 2D (¹H-¹H COSY，HMQC and HMBC) NMR techniques.

Key words: NMR, assignments, 2D NMR, lasiodonin acetonide

CLC Number:

O641

ZHANG Hai-Yan, ZHAO Tian-Zeng, GUO Wei, WU Ming-Jian. An NMR Study of Lasiodonin Acetonide[J]. Chinese Journal of Magnetic Resonance, 2005, 22(2): 155-162.

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