Obscurine: a new cyclostachine acid derivative from Beilschmiedia obscura.
نویسندگان
چکیده
From the methylene chloride extract of the stem bark of Beilschmiedia obscura, a new cyclostachine derivative, obscurine (1), has been isolated, together with six known compounds. The structure of compound 1 was established by spectroscopic methods, including 1- and 2-dimensional NMR techniques.
منابع مشابه
Antibacterial activities of Beilschmiedia obscura and six other Cameroonian medicinal plants against multi-drug resistant Gram-negative phenotypes
BACKGROUND The rapid spread of bacteria expressing multi-drug resistance propels the search for new antibacterial agents. The present study was designed to evaluate the antibacterial activities of the methanol extracts from Beilschmiedia obscura and six other Cameroonian plants against a panel of twenty nine Gram-negative bacteria including Multi-drug resistant (MDR) phenotypes. METHODS The p...
متن کاملCrystal structure of obscurine: a natural product isolated from the stem bark of B. obscura
The title compound, C24H31NO3 {systematic name: (E)-3-[(1R*,2S*,4aS*,8aR*)-2-(benzo[d][1,3]dioxol-5-yl)-1,2,4a,5,6,7,8,8a-octa-hydro-naphthalen-1-yl]-N-iso-butyl-acryl-amide}, is a natural product isolated from the stem bark of B. obscura. It is composed of an octa-hydro-naphthalene ring system substituted with an essentially planar benzodioxole ring system [r.m.s. deviation = 0.012 Å] and an e...
متن کاملSecondary Metabolites from the Roots of Beilschmiedia tsangii and Their Anti-Inflammatory Activities
Four new endiandric acid analogues, tsangibeilin C (1), tsangibeilin D (2), tricyclotsangibeilin (3) and endiandric acid M (4), one new lignan, beilschminol B (5) and two new sesquiterpenes, (+)-5-hydroxybarbatenal (6) and (4R,5R)-4,5-dihydroxycaryophyll-8(13)-ene (7), together with four known compounds (8-11), were isolated from the roots of Beilschmiedia tsangii (Lauraceae). The structures of...
متن کاملMokrzeckia obscura (Hym.: Pteromalidae), a hyperparasitoid of diamondback moth and a new record from Iran
در بررسی‌های مربوط به شناسایی پارازیتوئیدهای مراحل نابالغ بید کلم، Plutella xylostella (L.) (Lep.: Plutellidae)، در مزارع کلم و کلم گل استان اصفهان، یک گونه پارازیتوئید ثانویه به نام Mokrzeckia obscura Graham از خانواده‌ی Pteromalidae جمع‌آوری و شناسایی شد که برای اولین‌بار از ایران گزارش می‌شود. این گونه از پرورش لاروهای بید کلم که توسط Cotesia plutellae (Kurdjumov) (Hym.: Braconidae) پارازیته...
متن کامل(+)-Kunstlerone, a new antioxidant neolignan from the Leaves of Beilschmiedia kunstleri gamble.
A new neolignan, 3,4-dimethoxy-3',4'-methylenedioxy-2,9-epoxy-6,7-cyclo-1,8-neolign-11-en-5(5H)-one, which has been named (+)-kunstlerone (1), together with six known alkaloids: (+)-norboldine (2), (+)-N-methylisococlaurine (3), (+)-cassythicine (4), (+)-laurotetanine (5), (+)-boldine (6) and (-)-pallidine (7), were isolated from the leaves of Beilschmiedia kunstleri. The structures were establ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Natural product communications
دوره 6 11 شماره
صفحات -
تاریخ انتشار 2011