Piceanonols A, and B, triterpenoids bearing a novel skeletal system isolated from the bark of Picea jezoensis var. hondoensis
Autor: | Yasuko In, Reiko Tanaka, Tsuyoshi Kumagai, Hoyoku Nishino, Shunyo Matsunaga, Toshimasa Ishida |
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Rok vydání: | 1999 |
Předmět: | |
Zdroj: | Tetrahedron Letters. 40:6415-6418 |
ISSN: | 0040-4039 |
Popis: | A CHCl 3 extract of the stem bark of Picea jezoensis var. hondoensis (Pinaceae) afforded two triterpenoids named piceanonols A and B with a novel 14(13 → 12) abeo -12α H -serratane skeleton. Extensive NMR studies, MS spectral analyses and X-ray crystallographics established their structures as 3β-methoxy-14β,21β-dihydroxy-14(13 → 12) abeo -12α H -serratan-13-one and 21α-methoxy-14β-hydroxy-14(13 → 12) abeo -12α H -serratane-3,13-dione. |
Databáze: | OpenAIRE |
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