title: Xylopyrine-A and xylopyrine-B, two new peptide alkaloids from Zizyphus xylopyra.
abstract: Two new 13-membered cyclopeptide alkaloids, xylopyrine-A and xylopyrine-B have been isolated from Zizyphus xylopyra, and their structures established by spectral and chemical evidences.
authors.affiliation: Department of Medicinal Chemistry, Institute of Medical Sciences, Banaras Hindu University, Varanasi, India.
authors.forename: Ashok Kumar
authors.initials: AK
authors.lastname: Singh
authors.forename: Manoj Bhushan
authors.initials: MB
authors.lastname: Pandey
authors.forename: Virendra Pratap
authors.initials: VP
authors.lastname: Singh
authors.forename: Vidya Bhushan
authors.initials: VB
authors.lastname: Pandey
mesh_terms: D000470:Alkaloids / Q000737:chemistry*; D015394:Molecular Structure; D010455:Peptides / Q000737:chemistry*; D010456:Peptides, Cyclic / Q000737:chemistry*; D024301:Plant Bark / Q000737:chemistry; D018517:Plant Roots / Q000737:chemistry; D031957:Ziziphus / Q000737:chemistry*
chemical_list: D000470:Alkaloids; D010455:Peptides; D010456:Peptides, Cyclic; C525198:xylopyrine A; C525199:xylopyrine B