In investigating the unsaponifiable fraction of the ether extract from leaves of Betulq costatg Zrautv., we isolated triterpenes A, B, C and D, Triterpene A (I), C3#T2"3, m.p. 'l40-142ยฐC (petroleum ether),[d]]+4.80 (c 0.5; CHCZ3), hydroxyl absorption in the IR spectrum (CHC13) was observed at 3560 a
โฆ LIBER โฆ
Karachic acid: A new triterpenoid from Betula utilis
โ Scribed by Mohammad Ataullah Khan; Atta-ur-Rahman
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- English
- Weight
- 246 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0031-9422
No coin nor oath required. For personal study only.
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## Sumnary: From the methylated polar extract of (Cecropiaceae)' stem bark of Musanga cecropioides a novel triterpenic A-ring seco derivative has been obtained and the structure elucidated by spectroscopic methods. Many highly oxidised tetracyclic seco triterpen<)ids have been reported in the fam