Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2008 Apr 23;64(Pt 5):o892.
doi: 10.1107/S1600536808010556.

(4R,5R,6S,7R,8S,9R,10S,13S)-7,8β-Epoxy-momilactone-A

Rana Shabnam Habib, Muhammad Jamshaid, M Nawaz Tahir, Tahir Javed Khan, Islam Ullah Khan

(4R,5R,6S,7R,8S,9R,10S,13S)-7,8β-Epoxy-momilactone-A

Rana Shabnam Habib et al. Acta Crystallogr Sect E Struct Rep Online. .

Abstract

The title compound, C(20)H(26)O(4), was extracted from Leucas Urticifolia, a wild Lamiaceae herb distributed in the Punjab, Baluchistan, Sindh and the Rajputana desert of Pakistan. The plant is utilized for various medicinal applications by the local community. The title compound is based on the pimarane-diterpene skeleton. The mol-ecule exhibits an ep-oxy ring fused to momilactone-A, leading to a penta-cyclic mol-ecular structure. The absolute configuration was assigned by comparison with the crystal structure of momilactone, but needs further verification. The crystal structure is governed by four inter-molecular hydrogen-bond inter-actions of the C-H⋯O type.

PubMed Disclaimer

Figures

Fig. 1.
Fig. 1.
ORTEP diagram of the title compound (I) with displacement ellipsoids drawn at 30% probability level; H-atoms are shown by small circles of arbitrary radii; dashed lines indicate the direction of intermolecular C—H···O hydrogen bonding.
See this image and copyright information in PMC

References

    1. Bhattecharjee, S. K. (2004). Handbook of Medicinal Plants, 4th ed., p. 204. Jaipur: Pointers Publishers.
    1. Bruker (2005). SADABS Bruker AXS Inc. Madison, Wisconsin, USA.
    1. Bruker (2007). APEX2 and SAINT Bruker AXS Inc. Madison, Wisconsin, USA.
    1. Farrugia, L. J. (1997). J. Appl. Cryst.30, 565.
    1. Farrugia, L. J. (1999). J. Appl. Cryst.32, 837–838.