title: A new naphthoquinone from Ceiba pentandra.
abstract: A new naphthoquinone, 2,7-dihydroxy-8-formyl-5-isopropyl-3-methyl-1,4-naphthoquinone (1) together with a known naphthoquinone, 8-formyl-7-hydroxy-5-isopropyl-2-methoxy-3-methyl-1,4-naphthoquinone (2), has been isolated from the heartwood of Ceiba pentandra. The structures of 1 and 2 have been elucidated by extensive 1D and 2D NMR experiments.
authors.affiliation: Natural Products Division, Department of Chemistry, Sri Venkateswara University, Tirupati 517 502, India.
authors.forename: P Hari
authors.initials: PH
authors.lastname: Kishore
authors.forename: M Vijaya Bhaskar
authors.initials: MV
authors.lastname: Reddy
authors.forename: D
authors.initials: D
authors.lastname: Gunasekar
authors.forename: Cristelle
authors.initials: C
authors.lastname: Caux
authors.forename: Bernard
authors.initials: B
authors.lastname: Bodo
mesh_terms: D035164:Ceiba / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D009285:Naphthoquinones / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: C479096:2,7-dihydroxy-8-formyl-5-isopropyl-3-methyl-1,4-naphthoquinone; C479097:8-formyl-7-hydroxy-5-isopropyl-2-methoxy-3-methyl-1,4-naphthoquinone; D009285:Naphthoquinones