title: New dipyranocoumarin from the leaves of Calophyllum apetalum Willd.
abstract: A new dipyranocoumarin, α-hydroxytomentolide A (1) was isolated from the leaves of Calophyllum apetalum together with the known compounds friedelin (2), apetalactone (3), inophyllum C (4) and canophyllol (5). The structure of the new compound was established by spectroscopic studies which include (1)H NMR, (13)C NMR, NOESY, HetCOSY, COLOC experiments and single crystal X-ray diffraction analysis.
authors.affiliation: a Division of Organic Chemistry, CSIR-National Chemical Laboratory , Pune , 411 008 , India.
authors.forename: Swati P
authors.initials: SP
authors.lastname: Joshi
authors.forename: Smita R
authors.initials: SR
authors.lastname: Kulkarni
authors.forename: Usha D
authors.initials: UD
authors.lastname: Phalgune
authors.forename: Vedavati G
authors.initials: VG
authors.lastname: Puranik
mesh_terms: D029759:Calophyllum / Q000737:chemistry*; D003374:Coumarins / Q000737:chemistry / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D010936:Plant Extracts / Q000032:analysis*; D018515:Plant Leaves / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D003374:Coumarins; D010936:Plant Extracts; C000589094:alpha-hydroxytomentolide A