title: Pseudoguaianolides from the flowers of Parthenium hysterophorus.
abstract: Chemical investigation on the flowers of Parthenium hysterophorus has resulted in the isolation of four new pseudoguaianolides, hysterones A-D along with the known compounds, parthenin, coronopilin, 2beta-hydroxycoronopilin and tetraneurin-A. The structures of the new compounds were established by interpretation of their spectral (1D and 2D NMR) data. The X-ray crystallographic analysis of hysterones A and C was also carried out.
authors.affiliation: Indian Institute of Chemical Technology, Hyderabad 500 007, India.
authors.forename: C
authors.initials: C
authors.lastname: Ramesh
authors.forename: N
authors.initials: N
authors.lastname: Ravindranath
authors.forename: Biswanath
authors.initials: B
authors.lastname: Das
authors.forename: A
authors.initials: A
authors.lastname: Prabhakar
authors.forename: Jagadeesh
authors.initials: J
authors.lastname: Bharatam
authors.forename: K
authors.initials: K
authors.lastname: Ravikumar
authors.forename: A
authors.initials: A
authors.lastname: Kashinatham
authors.forename: T C
authors.initials: TC
authors.lastname: McMorris
mesh_terms: D019659:Asteraceae / Q000737:chemistry*; D018360:Crystallography, X-Ray; D035264:Flowers / Q000737:chemistry; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D012717:Sesquiterpenes / Q000737:chemistry* / Q000302:isolation & purification*
chemical_list: D012717:Sesquiterpenes