title: Halosterols A and B, chymotrypsin inhibitory sterols from Haloxylon recurvum.
abstract: Two new sterols, halosterols A (1) and B (2), have been isolated from the CHCl(3) soluble fraction of Haloxylon recurvum, and their structures were elucidated by spectroscopic techniques including two dimensional-NMR. Both the compounds displayed chymotrypsin enzyme inhibitory potential.
authors.affiliation: Department of Chemistry, Baghdad-ul-Jadid Campus, Islamia University, Bahawalpur, Pakistan.
authors.forename: Shafqat
authors.initials: S
authors.lastname: Hussain
authors.forename: Ejaz
authors.initials: E
authors.lastname: Ahmed
authors.forename: Abdul
authors.initials: A
authors.lastname: Malik
authors.forename: Abdul
authors.initials: A
authors.lastname: Jabbar
authors.forename: Muhammad
authors.initials: M
authors.lastname: Ashraf
authors.forename: Muhammad Arif
authors.initials: MA
authors.lastname: Lodhi
authors.forename: Muhammad Iqbal
authors.initials: MI
authors.lastname: Choudhary
mesh_terms: D019663:Chenopodiaceae / Q000737:chemistry*; D002784:Cholesterol / Q000031:analogs & derivatives* / Q000494:pharmacology; D002918:Chymotrypsin / Q000037:antagonists & inhibitors*; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D008968:Molecular Conformation; D010154:Pakistan; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology; D021241:Spectrometry, Mass, Electrospray Ionization; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D014361:Trypsin Inhibitors / Q000494:pharmacology*
chemical_list: D010936:Plant Extracts; D014361:Trypsin Inhibitors; C032249:halosterol; D002784:Cholesterol; D002918:Chymotrypsin