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Bangangxanthone A and B, two xanthones from the stem bark of Garcinia polyantha Oliv.
Two xanthones, bangangxanthone A (1) [1,5,8-trihydroxy-6'-methyl-6'-(4-methylpent-3-enyl)- pyrano[2',3':3,4]xanthone] and B (2) [1,4,8-trihydroxy-2-prenylxanthone], along with two known xanthones,Expand
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Cholinesterase inhibitory pregnane-type steroidal alkaloids from Sarcococca hookeriana
The bioassay-guided phytochemical investigation on Sarcococca hookeriana have resulted in the isolation of four new pregnane-type steriodal alkaloids: hookerianamide-DExpand
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Extraluminal migration of swallowed foreign body into the neck.
Although case descriptions of foreign bodies in the upper aerodigestive tract are abundant, only a small number of ingested foreign bodies perforate the esophagus, and an even smaller fractionExpand
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Tyrosinase inhibitory and antileishmanial constituents from the rhizomes of Paris polyphylla
The search for bioactive natural products from the rhizomes of Paris polyphylla (Trilliaceae) has resulted in the isolation of four known constituents, 1,5-dihydroxy-7-methoxy-3-methylanthraquinoneExpand
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Anti-angiogenic activity of sesterterpenes; natural product inhibitors of FGF-2-induced angiogenesis
Angiogenesis, the growth of new blood vessels from the pre-existing vasculature is of physiological and pathological importance. We have investigated the anti-angiogenic potential of two naturallyExpand
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Leucosceptrine--a novel sesterterpene with prolylendopeptidase inhibitory activity from Leucosceptrum canum.
A novel sesterterpene, leucosceptrine, was isolated from the medicinal plant Leucosceptrum canum from Nepal. The structure was determined by single-crystal X-ray diffraction and spectroscopicExpand
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Urease inhibitor from Datisca cannabina linn
A new flavonoid datisdirin (1), along with eight known compounds tectochrysine (2), cearoin (3), sideroxyline (4), ursolic acid (5), corosolic acid (6), arjunolic acid (7), erythrodiol (8) andExpand
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Structure activity relationship studies on antileishmanial steroidal alkaloids from Sarcococca hookeriana
The search for antileishmanial constituents from the medicinal plant Sarcococca hookeriana (Buxaceae) of Nepalese origin has resulted in the isolation of 17 (1–17) active steroidal alkaloids.Expand
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Novel sesterterpenes from Leucosceptrum canum of nepalese origin.
Two novel sesterterpenoids, leucosesterterpenone (1) and leucosesterlactone (2), with novel skeleta were isolated from the hexane extract of the medicinal plant, Leucosceptrum canum. Their structuresExpand
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Hydroxylation of the sesterterpene leucosceptrine by the fungus Rhizopus stolonifer.
The microbial transformation of leucosceptrine (1), the first member of class leucosesterterpenes, by Rhizopus stolonifer afforded two metabolites, 1alpha-hydroxyleucosceptrine (2), andExpand
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