trimethyl ether/neoplasms

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The application of formyl group activation of bromopyrrole esters to formal syntheses of lycogarubin C, permethyl storniamide A and lamellarin G trimethyl ether.

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Lycogarubin C, permethyl storniamide A and lamellarin G trimethyl ether are pyrrole containing, natural products, which exhibit interesting biological properties. Such properties include anti-tumor activity on a variety of cancer cell lines including those that confer drug resistance, inhibition of

New erythroxane-type diterpenoids from Fagonia boveana (Hadidi) Hadidi & Graf.

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The aerial parts of Fagonia boveana afforded two new erythroxane-type diterpenes, 3beta,15,16-trihydroxy-erythrox-4(18)-ene (2) and 15,16-dihydroxy-cis-ent-erythrox-3-ene (fagonene) (3) together with two known ones; 16-O-acetylfagonone (1) and 7beta-hydroxy fagonene (8). Also a new guaiane

New ent-kaurane diterpenoid dimer from Pulicaria inuloides.

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A new naturally occurring ent-kaurane diterpenoid dimer, 15β, 15'β-oxybis (ent-kaur-16-en-19-oic acid) (1) along with six known compounds, 15β-hydroxy-ent-kaur-16-en-19-oic acid (2), 15β-hydroxy-ent-kaur-16-en-19-oate-β-d-glucopyranoside (3), 6-hydroxykaempferol-3, 7-dimethyl ether (4),

Ethnopharmacology, phytochemistry and pharmacology: a successful combination in the study of Croton cajucara.

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Phytochemical and pharmacological studies of Croton cajucara were oriented by traditional medicine. The stem bark of the mature plant is a rich source of clerodane-type diterpenes: trans-dehydrocrotonin (DCTN), trans-crotonin (CTN), cis-cajucarin B, cajucarin A, cajucarinolide and two novel

Antimicrobial, anticancer, and antioxidant compounds from Premna resinosa growing in Saudi Arabia.

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BACKGROUND Premna resinosa (Hochst.) Schauer (Lamiaceae) is used in many places to treat bronchitis, respiratory illness and convulsions of the rib cage. OBJECTIVE This study evaluates the anticancer, antimicrobial and antioxidant activities of P. resinosa, and isolates some responsible

Toxicological evaluation of the natural products and some semisynthetic derivatives of Heterotheca inuloides Cass (Asteraceae).

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BACKGROUND Heterotheca ineuloides Cass (Asteraceae), popularly known as árnica mexicana, is widely used in Mexican traditional medicine to treat bruises, dermatological problems, rheumatic pains, and other disorders as cancer. The major constituents in H. inuloides are cadinane type sesquiterpenes,

Identification of a new cytotoxic biflavanone from Selaginella doederleinii.

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A new biflavanone, 2,2'',3,3''-tetrahydrorobustaflavone 7,4',7''-trimethyl ether (1) was isolated from the whole plant of Selaginella doederleinii HIERON. (Selaginellaceae) together with the known biflavonoid, robustaflavone 7,4',7''-trimethyl ether (2) as the cytotoxic constituents against the

Cytotoxic biflavonoids from Selaginella delicatula.

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Four new biflavonoids-robustaflavone 4'-methyl ether (1), robustaflavone 7,4'-dimethyl ether (2), 2",3" -dihydrorobustaflavone 7,4', -dimethyl ether (3), and 2",3" '-dihydrorobustaflavone 7,4', 7"-trimethyl ether (4)-as well as two known biflavonoids, robustaflavone and amentoflavone, and three

Antineoplastic agents. 465. Structural modification of resveratrol: sodium resverastatin phosphate.

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As an extension of structure/activity investigations of resveratrol (1), phenstatin (2c), and the cancer antiangiogenesis drug sodium combretastatin A-4 phosphate (2b), syntheses of certain related stilbenes (14) and benzophenones (16) were undertaken. The trimethyl ether derivative of

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