Caloxanthone C: a pyranoxanthone from the stem bark of Calophyllum soulattri.
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 sy...
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| Format: | Article |
| Language: | English English |
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International Union of Crystallography
2011
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| Online Access: | http://psasir.upm.edu.my/id/eprint/24933/ http://psasir.upm.edu.my/id/eprint/24933/1/Caloxanthone%20C.pdf |
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| author | Ee, Gwendoline Cheng Lian Siau, Hui Mah Huey, Chong Kwong Soek, Sin Teh Mohamed Tahir, Mohamed Ibrahim Silong, Sidik |
| author_facet | Ee, Gwendoline Cheng Lian Siau, Hui Mah Huey, Chong Kwong Soek, Sin Teh Mohamed Tahir, Mohamed Ibrahim Silong, Sidik |
| author_sort | Ee, Gwendoline Cheng Lian |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | 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]. |
| first_indexed | 2025-11-15T08:42:34Z |
| format | Article |
| id | upm-24933 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-15T08:42:34Z |
| publishDate | 2011 |
| publisher | International Union of Crystallography |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-249332015-09-09T03:19:33Z http://psasir.upm.edu.my/id/eprint/24933/ Caloxanthone C: a pyranoxanthone from the stem bark of Calophyllum soulattri. Ee, Gwendoline Cheng Lian Siau, Hui Mah Huey, Chong Kwong Soek, Sin Teh Mohamed Tahir, Mohamed Ibrahim Silong, Sidik 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]. International Union of Crystallography 2011-10 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/24933/1/Caloxanthone%20C.pdf 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 http://www.iucr.org/ 10.1107/S1600536811036294 English |
| spellingShingle | Ee, Gwendoline Cheng Lian Siau, Hui Mah Huey, Chong Kwong Soek, Sin Teh Mohamed Tahir, Mohamed Ibrahim Silong, Sidik Caloxanthone C: a pyranoxanthone from the stem bark of Calophyllum soulattri. |
| title | Caloxanthone C: a pyranoxanthone from the stem bark of Calophyllum soulattri. |
| title_full | Caloxanthone C: a pyranoxanthone from the stem bark of Calophyllum soulattri. |
| title_fullStr | Caloxanthone C: a pyranoxanthone from the stem bark of Calophyllum soulattri. |
| title_full_unstemmed | Caloxanthone C: a pyranoxanthone from the stem bark of Calophyllum soulattri. |
| title_short | Caloxanthone C: a pyranoxanthone from the stem bark of Calophyllum soulattri. |
| title_sort | caloxanthone c: a pyranoxanthone from the stem bark of calophyllum soulattri. |
| url | http://psasir.upm.edu.my/id/eprint/24933/ http://psasir.upm.edu.my/id/eprint/24933/ http://psasir.upm.edu.my/id/eprint/24933/ http://psasir.upm.edu.my/id/eprint/24933/1/Caloxanthone%20C.pdf |