New coumarin and dihydrocinnamic acid derivatives from two Malaysian populations of Micromelum minutum
Three novel compounds, two compounds and a dihydrocinnamic acid, have been isolated from two collections of Micromelum minutum and identified by means of NMR spectroscopy. A sample collected from Pahang gave the typical coumarin micromelin and a new dihydrocinnamic acid derivative of micromelin whic...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English English |
| Published: |
Elsevier Science
1994
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| Online Access: | http://psasir.upm.edu.my/id/eprint/56240/1/New%20coumarin%20and%20dihydrocinnamic%20acid%20derivatives%20from%20two%20Malaysian%20populations%20of%20Micromelum%20minutum.pdf http://psasir.upm.edu.my/id/eprint/56240/7/1-s2.0-003194229485100X-main.pdf http://psasir.upm.edu.my/id/eprint/56240/ http://www.sciencedirect.com/science/article/pii/003194229485100X# |
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| Summary: | Three novel compounds, two compounds and a dihydrocinnamic acid, have been isolated from two collections of Micromelum minutum and identified by means of NMR spectroscopy. A sample collected from Pahang gave the typical coumarin micromelin and a new dihydrocinnamic acid derivative of micromelin which was identified as 1,2-seco-dihydromicromelin. The second sample, collected from Kelantan, gave two new tetracyclic coumarins, microminutinin and 6-methoxymicrominutinin, which possess a fused bifurano system that appears to be derived by cyclization of a 7-oxygenated-8-(1,2-dimethyl)propylcoumarin precursor. The structure of microminutinin is revised from that proposed in a previous paper. |
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