mitrephora vulpina/alkaloid

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A novel alkaloid from Mitrephora maingayi.

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Prijava / prijava

A novel alkaloid, maingayinine, together with dicentrinone, dicentrinene, L-2-O-methyl-chiro-inositol, allantoin, glaucine, N-phenyl-2-naphthylamine, terephthalic acid and ayanin, was isolated from the twigs of Mitrephora maingayi Hook (Annonaceae). Their structures were established predominantly by

Antimalarial activity of azafluorenone alkaloids from the Australian tree Mitrephora diversifolia.

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Prijava / prijava

Mass-directed isolation of the CH2Cl2/MeOH extract from the roots of the Australian tree Mitrephora diversifolia resulted in the purification of the new azafluorenone alkaloid 5,8-dihydroxy-6-methoxyonychine (1) together with the known natural product 5-hydroxy-6-methoxyonychine (2). The structures

Inhibitory effects of phylligenin and quebrachitol isolated from Mitrephora vulpina on platelet activating factor receptor binding and platelet aggregation.

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Phylligenine, together with quebrachitol, stigmasterol and two aporphine alkaloids--oxoputerine and liriodenine--were isolated from the twigs of Mitrephora vulpina C.E.C. Fisch. They were evaluated for their ability to inhibit platelet activating factor (PAF) receptor binding to rabbit platelets

Bioactive constituents of the stem bark of Mitrephora glabra.

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Bioactivity-guided fractionation of the stem bark of Mitrephora glabra yielded nine compounds, comprising three ent-kaurenoids (1-3), five polyacetylenic acids/esters (4-8), and one aporphine alkaloid, liriodenine (9). The structures of the six new compounds (1-3, 5, 7, and 8) were determined by

Cytotoxic compounds from the leaves and stems of the endemic Thai plant Mitrephora sirikitiae

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Prijava / prijava

Context: Mitrephora sirikitiae Weeras., Chalermglin & R.M.K. Saunders (Annonaceae) is a plant endemic to Thailand. Its constituents and their biological activities are unknown.Objective: Isolation and identification of the compounds in the leaves and stems of M.

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