Two pentacyclic triterpenes isolated from Maprounea africana, 1ßhydroxymaprounic acid 3-
/>-hydroxybenzoate [3], 2a-hydroxymaprounic acid 2, 3-bis-phydroxybenzoate [4] and their …

Pentacyclic triterpenoids based on the taraxer-14-ene skeleton with a C-28 attached
carboxylic acid group have been isolated from the roots of Maprounea africana. These …

Anti-HIV activity and the inhibition of phorbol ester receptor binding activity in two species of
Maprounea were traced to small amounts of highly potent phorbol esters of the daphnane …

In the search for new bioactive natural products, plant sources represent a particularly
suitable starting point in drug discovery. Among natural products, phenolic derivatives have …

A polyphenol-rich extract of the medicinal resurrection plant Myrothamnus flabellifolia was
shown to inhibit viral (M-MLV and HIV-1) reverse transcriptases. Fractionation and …

Fifty-five triterpenoids consisting of 19 tetracyclic, 32 pentacyclic, and 4 incompletely
cyclized triterpenoids, and 2 sterols, mostly isolated from various plant and fungal materials …

As part of a search for novel inhibitors of HIV-1 reverse transcriptase, the acetone extract of
the giant African snail, Achatina fúlica, was shown to be active. Fractionation of the extract …

Six flavonoids, among them a new dihydroflavonol, 6, 8-diprenylaromadendrin (1), and the
flavonol 6, 8-diprenylkaempferol (3), have been isolated from the organic extract of Monotes …

Aqueous and methanolic extracts of 39 Panamanian medicinal plants were tested for anti-
human immunodeficiency virus (HIV) effects. The extracts were tested for the inhibition of …

Oleanolic acid (1) was identified as an anti-HIV principle from several plants, including Rosa
woodsii (leaves), Prosopis glandulosa (leaves and twigs), Phoradendron juniperinum …