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Nematicidal constituents of the aerial parts of Lantana camara.
Two new constituents, lantanoside and lantanone and the known compounds linaroside and camarinic acid were isolated from the aerial parts of Lantana camara and structures of the new compounds were elucidated by spectroscopic and chemical techniques.
Oleanderol, a new pentacyclic triterpene from the leaves of Nerium oleander
New insecticidal amides from petroleum ether extract of dried Piper nigrum L. whole fruits.
- B. Siddiqui, Tahsin Gulzar, Azhar Mahmood, S. Begum, B. Khan, F. Afshan
- ChemistryChemical & pharmaceutical bulletin
- 1 November 2004
The petroleum ether extract of dried ground whole fruits of Piper nigrum L. afforded 20 compounds including two new insecticidal amides named as pipnoohine (1), and pipyahyine (2), seven reported for the first time from this plant, and eleven known compounds, which have been identified through comparison of their spectral data with those reported in literature.
Gastrointestinal, selective airways and urinary bladder relaxant effects of Hyoscyamus niger are mediated through dual blockade of muscarinic receptors and Ca2+ channels
- A. Gilani, Arif-ullah Khan, S. Begum
- Biology, MedicineFundamental & clinical pharmacology
- 1 February 2008
Results suggest that the antispasmodic effect of H. niger is mediated through a combination of anticholinergic and Ca2+ antagonist mechanisms, which occur at much lower concentrations in the trachea and bladder.
Triterpenoids from the leaves of Psidium guajava.
Pentacyclic triterpenoids from Lantana camara
New anthraquinones from the stem of Morinda citrifolia Linn.
- B. Siddiqui, F. Sattar, S. Begum, Tahsin Gulzar, F. Ahmad
- ChemistryNatural product research
- 1 October 2006
The structures of two new compounds isolated from the stem of Morinda citrifolia were elucidated by spectral analysis including 2D-NMR techniques.
Triterpenes, A sterol and A monocyclic alcohol from Momordica charantia
Bio-active cardenolides from the leaves of Nerium oleander.
Chemical Constituents of the Leaves of Psidium guajava
- S. Begum, S. I. Hassan, S. N. Ali, B. Siddiqui
- ChemistryChemistry of Natural Compounds
- 5 February 2015
Five constituents including one new pentacyclic triterpenoid guajanoic acid (1) and four known compounds beta-sitosterol (2), uvaol (3), oleanolic acid (4), and ursolic acid (5) have been isolated…