In this review, I describe various natural manifestations of purine systems, ie, methylated,
higher‐alkylated, and glycosylated forms. These comprise the purine alkaloids, cytokinines …

Covering: 1990–2002This review covers the literature published between January 1990 and
December 2002 (inclusive) for natural products with reported antimycobacterial activity, with …

New glycosphingolipids, named agelasphins (1-8), have been isolated by antitumor and
immunostimulatory bioassay-guided purification from an extract of a marine sponge, Agelas …

Biosurfactants combine physicochemical properties with biological activities. Although
biosurfactants are often expressed by microorganisms, an increasing amount is produced by …

Covering: up to the end of 2018 Natural selection relentlessly drives the evolution of natural
products, favoring those that enhance the survival of species. During this evolutionary …

Protein tyrosine phosphatase 1B (PTP1B) is a crucial therapeutic target for multiple human
diseases comprising type 2 diabetes (T2DM) and obesity because it is a seminal part of a …

This review is the second part of a report on the literature of marine natural products that will
update the author's 1977 review.'The first part of the report covered the literature published …

H-10 „, H-ll—Hg-15, and H-14- H-13. two sp** 3 methylene, one of which bore oxygen (3C
67.5 (t, C-8) and 29.3 (t, C-10)), one sp3 quaternary carbon (5C 51.8 (s, C-9)), one sp3 …

Extracts of 19 of 24 species of sponge collected from Queensland. Australia, inhibited the
growth of test microorganisms in in-vitro assays. A similar result has been obtained by …

The secondary metabolite content of four different species of Agelas (Porifera) from the West
Indies has been studied. All the compounds isolated are already known metabolites whose …