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Structural and spectral assignment of a new diterpenoid isolated from Ballota undulata and a complete 1H and 13C NMR data assignment for three other structurally related compounds

✍ Scribed by Ahmed A. Hussein; María L. Jimeno; Benjamín Rodríguez

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
110 KB
Volume
45
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The structure of 3β‐hydroxyballotinone, a new labdane diterpenoid isolated from Ballota undulata, has been established by NMR spectroscopic studies. In addition, complete and unambiguous assignments of the ^1^H and ^13^C NMR spectra of three other already known labdanes (ballotinone, ballonigrin and ballonigrinone) isolated from the same source have been achieved. The assignments are based on 2D shift‐correlated ^1^H^1^H COSY, ^1^H^13^C gHSQC [^1^J(C,H)] and ^1^H^13^C gHMBC [^n^J(C,H) (n = 2 and 3)], and NOE experiments. Copyright © 2007 John Wiley & Sons, Ltd.

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