Podocarpane-type trinorditerpenes from the bark of Taiwania cryptomerioides.
نویسندگان
چکیده
Five new podocarpane-type trinorditerpenes were isolated from the bark of Taiwania cryptomerioides. Structures of 1beta, 14-dihydroxy-13-methoxy-6,8,11,13-podocarpatetraene (1), 1beta, 14-dihydroxy-13-methoxy-8,11,13-podocarpatriene (2), 13-hydroxy-12-methoxy-8,11,13-podocarpatrien-3-one (3), 14-hydroxy-13-methoxy-1,8,11,13-podocarpatetraen-3-one (4), and 13-methoxy-8,12-podocarpatriene-11,14-dione (5) were determined by NMR, MS, and other spectral and chemical evidence.
منابع مشابه
Four new podocarpane-type trinorditerpenes from the bark of Taiwania cryptomerioides.
Further studies on the bark of Taiwania cryptomerioides found four new podocarpane derivatives, 1beta,13-dihydroxy-8,11,13-podocarpatriene (1), 14,18-dihydroxy-13-methoxy-8,11,13-podocarpatriene (2), 1beta,14-dihydroxy-13-methoxy-8,11,13-podocarpatriene-2,7-dione (3), and 3beta,14-dihydroxy-13-methoxy-8,11,13-podocarpatrien-7-one (4), together with a known 1beta,13,14-trihydroxy-8,11,13-podocar...
متن کامل18-nor-Podocarpanes and podocarpanes from the Bark of Taiwania cryptomerioides.
Seven nor- and podocarpane-type diterpenes were isolated from the bark of Taiwania cryptomerioides Hayata, including three 18-nor-podocarpanes: 18-nor-1beta,4alpha,14-trihydroxy-13-methoxy-8,11,13-podocarpatriene (1), 18-nor-1beta,4alpha,13,14-tetrahydroxy-8,11,13-podocarpatrien-7-one (2), 18-nor-1beta,4alpha,14-trihydroxy-13-methoxy-8,11,13-podocarpatrien-7-one (3), 1beta,14,19-trihydroxy-13-m...
متن کاملQuinone-type podocarpanes from the bark of Taiwania cryptomerioides.
Three quinone-type podocarpanes, 3beta-hydroxy-13-methoxy-8,12-podocarpadiene-11,14-dione (1), 18-hydroxy-13-methoxy-8,12-podocarpadiene-11,14-dione (2), and 13-methoxy-8,12-podocarpadiene-2,11,14-trione (3) were isolated from the bark of Taiwania cryptomerioides. Their structures were elucidated using spectral methods.
متن کاملNew abietane and seco-abietane diterpenes from the roots of Taiwania cryptomerioides.
Four new diterpenes, 3-oxosaprorthoquinone (1), 3-oxomicrostegiol (2), 3-oxoisotaxodione (3), and taiwaninal (4), together with two known compounds, 3-oxosapriparaquinone (5) and 6-dehydrohinokiol (6), were isolated from the roots of Taiwania cryptomerioides. The structures of 1-4 were principle elucidated based on spectral evidence.
متن کاملEstablishment of expressed sequence tags from Taiwania (Taiwania cryptomerioides Hayata) seedling cDNA
Taiwania (Taiwania cryptomerioides Hayata), native to Taiwan, is one of the “living fossils” from the Tertiary period of the Cenozoic era. To isolate genes involved in wood formation and biochemical synthesis from this tree, 436 randomly selected clones from a cDNA library derived from seedling were sequenced and analyzed firstly. Contig analysis of these expressed sequence tags (ESTs) identifi...
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ورودعنوان ژورنال:
- Journal of natural products
دوره 63 5 شماره
صفحات -
تاریخ انتشار 2000