کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5267051 1385327 2012 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Biogenetically related caged ent-kaurane diterpenoids from Isodon eriocalyx var. laxiflora
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Biogenetically related caged ent-kaurane diterpenoids from Isodon eriocalyx var. laxiflora
چکیده انگلیسی
Two novel caged ent-kauranoids, neolaxiflorins D (1) and E (2), along with three other new ent-kauranoids, neolaxiflorins F-H (3-5), and a known one, eriocalyxin B (6), were obtained from Isodon eriocalyx var. laxiflora. Neolaxiflorin D (1) is the first 15,16-seco-16,17-dinor-ent-kaurane diterpenoid, and neolaxiflorin E (2) is the first 15,16-seco-17-homo-ent-kauranoid. The absolute configurations of ent-kauranoids 1 and 2 were determined by single-crystal X-ray diffraction analyses. Structural analysis of intermediate compounds 3-5 indicated that eriocalyxin B (6) is a biogenetic precursor of caged ent-kauranoids 1 and 2 as illustrated. The cytotoxic activity of the new compounds was evaluated by an MTT assay.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tetrahedron Letters - Volume 53, Issue 22, 30 May 2012, Pages 2777-2781
نویسندگان
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