Cucurbitacins and cucurbitane glycosides: structures and biological activities

https://www.repositorio.ufop.br/bitstream/123456789/805/6/ARTIGO_TrioxygenatedNaturallyOccurring.pdf

Tetraoxygenated naturally occurring xanthones

Chemosystematics is a common tool in systematics and taxonomy of extant plants. Terpenoids have been found to be especially valuable for chemosystematic investigations of conifers. A review of data in the extensive literature revealed some characteristic distribution patterns of sesqui-, di-, and triterpenoids in extant conifer families. The numerous terpenoids can be assigned to approximately 40 sesquiterpenoid, 17 diterpenoid, and only a few triterpenoid structural classes. Some of these terpenoid classes (e.g., cadinanes, humulanes, labdanes, pimaranes) are unspecific and distributed among all conifers. Other structural classes occur in certain clusters of families (e.g., totaranes in Podocarpaceae, Taxodiaceae, and Cupressaceae s.str.) or were restricted to species of only one conifer family (e.g., cuparanes in Cupressaceae s.str.).

https://www.jstor.org/stable/pdfplus/4354389.pdf

Sesqui-, di-, and triterpenoids as chemosystematic markers in extant conifers—A review

Xanthones from guttiferae

The cucurbitacins are triterpenic plant principles with varied pharmacological activities, found in several botanical families. This review includes the structures described in the literature, the plant-containing cucurbitacins and their main pharmacological effects.

Thomas G. McCloud

Papers

Goniothalenol: a novel, bioactive, tetrahydrofurano-2-pyrone from (annonaceae)

Structure and stereochemistry of psorospermin and related cytotoxic dihydrofuranoxanthones from Psorospermum febrifugum

Revised structure of podolactone C, the antileukemic component of Podocarpus milanjianus Rendle

Spinosides A and B. Two cytotoxic cucurbitacin glycosides from Desfontainia spinosa

Analysis of biosynthesised terpene alcohols facilitated by C18 phase-bonded silica