A phytochemical study of two plant species, Viscum cruciatum Sieber and Crataegus monogyna Jacq., was completed to investigate the influence of the parasite Viscum cruciatum on the host Crataegus monogyna. The study was carried out with two samples and consisted of hexane extracts of the Viscum cruciatum parasitizing on Crataegus monogyna and C monogyna. In these samples ursolic acid, beta-sito...

After bioassay-guided fractionation of the extract from Sandoricum koetjape bark, which exhibited significant toxicity to killifish (Oryzias latipes), two ichthyotoxic triterpenoids were isolated and characterized as koetjapic acid and 3-oxo-olean-12-en-29-oic acid. These constituents, along with non-toxic katonic acid, had a remarkable inhibitory effect on Epstein-Barr virus early antigen (EBV...

Fourteen of the methyl 2-cyano-3,12-dioxo-18β-olean-1,9(11)-dien-30-oate (CDODO-Me-12, 10d) analogues with different structures of ring C were synthesized to determine the active groups for inhibiting cell growth and inducing apoptosis in human leukemia HL-60 cells. An unsaturated group in ring C was required to maintain the ability to inhibit cell growth and induce apoptosis. Compound 10e with...

Glycyrrhetinic acid (GA) and its related compounds are known to have anti-inflammatory activity and also to inhibit liver carcinogenesis and tumor growth. GA and related compounds inhibited cell proliferation of the human hepatoma cell line, HepG2. Among five compounds tested, ursolic acid and 18beta-olean-12-ene-3beta, 23, 28-triol (18beta-erythrotriol) were comparatively effective, where the ...

THE TITLE COMPOUND [SYSTEMATIC NAME: 11-oxo-2,3-(oxy-dinitrilo)olean-12-en-29-oic acid], C(30)H(42)N(2)O(4), contains a linear array of five six-membered rings and a five-membered heterocyclic ring. The C ring, containing an α,β-unsaturated ketone, has a slightly distorted half-chair conformation, as does the A ring, with N-C-C angles 125.3 (5), 111.2 (4), 124.9 (5) and 109.2 (5)°, while the ot...

Several known triterpenoids have been isolated from the roots of Lantana camara L. along with two new ones namely: 3ß,19α-dihydroxy-ursan-28-oic acid (7) and methyl 21,22ß-epoxy-3ß-hydroxy-olean-12-en-28-oate (8a). The hepatoprotective principle, oleanolic acid (1), from the roots has been converted into its 28-->13ß-lactone 10 by a facile photo-oxidation reaction. The leaves of L. camara have ...

An ortho器1gebra, which is a natural generalization of an orthomodular I器ttice or po制, may be 咐附d 在s a "Iogic" or "proposition system" and, under a well精 defined set of circumstan仅锐地 element嚣 may be cJassified 在ccording to the Aristotelian modalities: 独优岱sary, impossibJe, possible, and con阳嚣~nt. The g附ssary pro韵。sitions 恼nd together to form a I侃辑1 filter, that i章. a set t如at inter脱15 every 源。ole...

Chromatographic purification of the n-hexane and dichloromethane extracts of Nuxia oppositifolia aerial parts, growing in Saudi Arabia, resulted in the isolation and characterization of three new labdane-type diterpene acids, 2β-acetoxy-labda-7-en-15-oic acid (1), 2β-acetoxy-7-oxolabda-8-en-15-oic acid (2), 2β-acetoxy-6-oxolabda-7-en-15-oic acid (3), and one new seco-triterpene, 3,4-seco olean-...

A bioassay-guided fractionation and chemical investigation of the trunk of Berberis koreana led to the isolation and identification of three new triterpenoids, 2 α,3 α,19 α-trihydroxy-urs-12-en-24-formyl-28-oic acid (1), 2 α,3 β,21 α-trihydroxy-urs-12-en-28-oic acid ( 2), and 3 β-acetyloxy-1-oxo-olean-12-en-28-oic acid (3), along with seven known triterpenoids (4-10). The structures of these ne...

Eclipta prostrata L. is one of the Chinese medicinal tonics which are usually used for treating loose teeth, dizziness, tinnitus, hemoptysis, hematuria, and uterine bleeding. However, quality control of this herbal medicine has been not satisfactory. This study reported its qualitative and quantitative analyses based on LC/MS method. UHPLC-DAD-Q-TOF-MS fingerprinting and MS fragmentation cleava...