Citation
Ee, Gwendoline Cheng Lian and Siau, Hui Mah and Huey, Chong Kwong and Soek, Sin Teh and Mohamed Tahir, Mohamed Ibrahim and Silong, Sidik
(2011)
Caloxanthone C: a pyranoxanthone from the stem bark of Calophyllum soulattri.
Acta Crystallographica Section E: Structure Reports Online, 67 (10).
pp. 2607-2608.
ISSN 1600-5368; ESSN:1600-5368
Abstract
The title compound [systematic name: 5,10-dihydroxy-2,2-dimethyl-12-(2-methylbut-3-en-2-yl)pyrano[3,2-b]xanthen-6(2H)-one], C23H22O5, isolated from the stem bark of Calophyllum soulattri, consists of four six-membered rings and a 2-methylbut-3-en-2-yl side chain. The tricyclic xanthone ring system is almost planar [maximum deviation = 0.093 (2) Å], whereas the pyranoid ring is in a distorted boat conformation. The 2-methylbut-3-en-2-yl side chain is in a synperiplanar conformation. There are two intramolecular O—H(...)O hydrogen bonds. In the crystal, molecules are linked by C—H(...)O interactions, forming a zigzag chain propagating in [010].
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Additional Metadata
| Item Type: | Article |
|---|---|
| Divisions: | Faculty of Science |
| DOI Number: | https://doi.org/10.1107/S1600536811036294 |
| Publisher: | International Union of Crystallography |
| Keywords: | Caloxanthone C; Pyranoxanthone; Calophyllum soulattri. |
| Depositing User: | Nur Farahin Ramli |
| Date Deposited: | 19 Aug 2013 03:07 |
| Last Modified: | 09 Sep 2015 03:19 |
| Altmetrics: | http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1107/S1600536811036294 |
| URI: | http://psasir.upm.edu.my/id/eprint/24933 |
| Statistic Details: | View Download Statistic |
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