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A new stereoisomer of stemmadenine alkaloid from Tabernaemontana heyneana |
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| Abstract: | A new alkaloid, 15‐β‐stemmadenine, was isolated from the fruits of Tabernaemontana heyneana Wall. from the ethanolic extract. The complete 1H and 13C NMR assignments of the compound were carried out using COSY, HMQC and HMBC. Stereochemistry at C‐15 and C‐16 was established using ROESY and temperature‐dependent 1H NMR studies. Copyright © 2002 John Wiley & Sons, Ltd. |
| Keywords: | Tabernaemontana heyneana Wall. (Syn. Ervatamia heyneana) Apocynaceae 15‐β ‐stemmadenine alkaloid NMR |