Di-nor- and 17-nor-pimaranes from Icacina trichantha
نویسندگان
چکیده
منابع مشابه
Antimicrobial and phytochemical screening of Icacina trichantha
Ethanol and water extracts of Icacina trichantha leaves were screened for their phytochemicals and antimicrobial activity against Escherichia coli, Staphylococcus aureus, streptococcus spp, Candida albicans and Klebsiella pneumonia. The result indicated that alkaloids, tannins, saponins, and phenols were present in the plant part. Both the ethanol extract and the water extract were active again...
متن کاملSynthesis of a Smoothened Cholesterol: 18,19-Di-nor-cholesterol
Herein, we report the first synthesis of a demethylated form of cholesterol (18,19-di-nor-cholesterol), in which the C18 and C19 methyl groups of the β-face were eliminated. Recent molecular simulations modeling 18,19-di-norcholesterol have suggested that cholesterol’s opposing rough β-face and smooth α-face play necessary roles in cholesterol’s membrane condensing abilities and, additionally, ...
متن کاملApoptosis in Drosophila: neither fish nor fowl (nor man, nor worm).
Studies in a wide variety of organisms have produced a general model for the induction of apoptosis in which multiple signaling pathways lead ultimately to activation of the caspase family of proteases. Once activated, these enzymes cleave key cellular substrates to promote the orderly dismantling of dying cells. A broad similarity exists in the cell death pathways operating in different organi...
متن کاملNeither fragments nor ellipsis *
Jason Merchant (2004, and Chap. 3, this volume) proposes to account for all speech acts performed with “fragments,” whether in discourse-initial position or otherwise, by appealing to syntactic ellipsis. Though his proposal is insightful, I offer empirical and methodological considerations against it. Empirical problems include: (a) His alleged “elliptical sentences” do not embed the way they s...
متن کاملNeither separate nor equivalent
Evidence suggests that binding, or encoding a feature with respect to other features in time and space, can convey cognitive advantages. However, evidence across many kinds of stimuli and paradigms presents a mixed picture, alternatively showing cognitive costs or cognitive advantages associated with maintaining bound representations. We examined memory for colored letters drawn from similar an...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Natural Products
سال: 2016
ISSN: 0163-3864,1520-6025
DOI: 10.1021/acs.jnatprod.6b00289