title: Unambiguous 13C NMR assignment of acnistins and absolute configuration of acnistin A.
abstract: Carbon and proton atoms were fully assigned in this new type of withanolide by HMQC and HMBC experiments. The absolute configuration of acnistin A was determined by X-ray diffraction. Proton and 13C NMR measurements are particularly useful in identifying members of this group of natural products.
authors.affiliation: Instituto de Bioorgánica, Centro de Productos Naturales Orgánicos Antonio Gonzalez, Universidad de La Laguna, Tenerife, Canary Island, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Gutiérrez Luis
authors.forename: F
authors.initials: F
authors.lastname: Echeverri
authors.forename: W
authors.initials: W
authors.lastname: Quiñones
authors.forename: A G
authors.initials: AG
authors.lastname: González
authors.forename: F
authors.initials: F
authors.lastname: Torres
authors.forename: G
authors.initials: G
authors.lastname: Cardona
authors.forename: R
authors.initials: R
authors.lastname: Archbold
authors.forename: M
authors.initials: M
authors.lastname: Rojas
authors.forename: A
authors.initials: A
authors.lastname: Perales
mesh_terms: D000736:Androstenes / Q000737:chemistry*; D018360:Crystallography, X-Ray; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D015394:Molecular Structure
chemical_list: D000736:Androstenes; C089050:acnistin A