title: Thespesenone and dehydrooxoperezinone-6-methyl ether, new sesquiterpene quinones from Thespesia populnea.
abstract: Thespesia populnea grows as a small tree or large shrub that occurs throughout Polynesia. We report the isolation of 7-hydroxycadalene (6), thespesenone (7), and dehydrooxoperezinone-6-methyl ether (8) from its red heartwood. Compounds 7 and 8 are reported for the first time in nature. Several other sesquiterpene quinones were isolated including mansonone E (4), mansonone F (3), mansonone D (1), mansonone G (9), mansonone M (10), and thespesone (4); the (13)C NMR spectra of these compounds are reported for the first time.
authors.affiliation: Southern Plains Agricultural Research Center, USDA, Agricultural Research Service, College Station, Texas 77845, USA.
authors.forename: Lorraine S
authors.initials: LS
authors.lastname: Puckhaber
authors.forename: Robert D
authors.initials: RD
authors.lastname: Stipanovic
mesh_terms: D019660:Malvaceae / Q000737:chemistry*; D015394:Molecular Structure; D009281:Naphthalenes / Q000737:chemistry / Q000302:isolation & purification*; D009285:Naphthoquinones / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D011114:Polynesia; D012717:Sesquiterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: C493121:7-hydroxycadalene; D009281:Naphthalenes; D009285:Naphthoquinones; D012717:Sesquiterpenes; C586321:mansonone G; C430708:mansonone A