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Unusual ent-isopimarane-type diterpenoids from the wood of Excoecaria agallocha
Abstract Three new ent -isopimarane-type diterpenoids with unusual 3,4-seco ( 1 ) and seven membered lactone moieties ( 1 – 2 ), along with four known compounds ( 4 – 7 ) were isolated from the woodExpand
Epimeric Excolides from the Stems of Excoecaria agallocha and Structural Revision of Rhizophorin A.
Excolides A-B (1-4) represent the first examples of a new class of secolabdanoids with an unprecedented framework, which were isolated from the stems of Excoecaria agallocha. Their structures wereExpand
Unusual isomeric corniculatolides from mangrove, Aegiceras corniculatum.
Four new isomeric macrolides of combretastatin D-2 congeners named isocorniculatolide A (1), 11-O-methylisocorniculatolide A (2), 11-O-methylcorniculatolide A (3), andExpand
Betulinic acid derivatives: a new class of α-glucosidase inhibitors and LPS-stimulated nitric oxide production inhibition on mouse macrophage RAW 264.7 cells
Abstract Chemical manipulation studies were conducted on betulinic acid (1), twenty-one new rationally designed analogues of 1 with modifications at C-28 were synthesized for their evaluation ofExpand
Ipomeolides A and B, Resin Glycosides from Ipomoea pes-caprae and Combination Therapy of Ipomeolide A with Doxorubicin.
Two new resin glycosides, ipomeolides A (1) and B (2), both with an unusual nonlinear heteropentasaccharide core, along with five known compounds were isolated from the n-hexane/CHCl3 (1:1) extractExpand
Self gelating isoracemosol A, new racemosaceramide A, and racemosol E from Barringtonia racemosa
Abstract Phytochemical investigation into the CHCl3 extract of the fruits of Barringtonia racemosa resulted in the isolation of two new metabolites along with isoracemosol A and betulinic acid asExpand
Biotransformation of Artemisinin to 14-Hydroxydeoxyartemisinin: C-14 Hydroxylation by Aspergillus flavus.
The biotransformation of the front-line antimalarial drug, artemisinin (1) by the filamentous fungus Aspergillus flavus MTCC-9167 was investigated. Incubation of compound 1 with A. flavus afforded aExpand
α-Glucosidase inhibitory monoacylated polyhydroxytriterpenoids from the fruits of Barringtonia racemosa
Abstract Chemical investigation of a lipophilic CHCl 3 extract of the dried fruits of Barringtonia racemosa resulted in the isolation of two unusual monoacylated polyhydroxy oleanane triterpenoidExpand
Cu-doped zeolitic imidazolate framework catalysed highly selective conversion of alkynes to $$\upbeta $$β-keto and vinyl sulfones using sodium sulfinates
Abstract$$\hbox {Cu}^{2+}$$Cu2+-doped zeolitic imidazolate framework-8 (ZIF-8)-catalyzed one-pot procedure to synthesize $$\upbeta $$β-keto and vinyl sulfones by the direct oxysulfonylation andExpand