Ergosterol peroxide, cycloart-23-en-3beta,25-diol, vanillin and 4-hydroxybenzaldehyde have been isolated and characterized from a crude methanol extract of Euphorbia lagascae. Previous studies have shown contradictory results about the antibacterial activity of ergosterol peroxide against
Bioassay-guided fractionation of the active AcOEt-soluble layer led to the isolation of two new pyranocoumarins, 3-hydroxyxanthyletin (1) and 3-methoxyxanthyletin (2), along with 22 known compounds including four simple coumarins, i.e., xanthyletin (3), umbelliferone (4), scopoletin (5), and
BACKGROUND
Inonotus obliquus is a medicinal mushroom that has been used as an effective agent to treat various diseases such as diabetes, tuberculosis and cancer. In order to elucidate the active fraction and its constituents, the effects of ethyl acetate fraction from I. obliquus (EAFI) on
As a continuation of our project aimed at a search for new antimycobacterial agents, several naturally occurring and synthetic compounds have been evaluated against Mycobacterium tuberculosis H37Rv and M. avium. Emphasis was placed on steroids and a series of isoprene long-chain alcohols to gain new
Three new triterpenoids, bonianic acids A (1) and B (2) and 3-O-acetyluncaric acid (3), were isolated from the leaves and twigs of Radermachera boniana, together with six known compounds, ursolic acid (4), oleanolic acid (5), 3-epi-oleanolic acid (6), 3α-O-acetyl-α-boswellic acid (7), ergosterol
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