title: Hamigerin A and a hamigerin D decomposition product.
abstract: The sponge Hamigera tarangaensis has yielded eight new compounds and we report here the structure of one of these compounds, hamigeran A, C(20)H(25)BrO(5), or methyl 7-bromo-4beta,6-dihydroxy-1beta-isopropyl-3aalpha,8-dimethyl-5-oxo-1a,3a,4,5-tetrahydrocyclopenta[a]naphthalene-4-carboxylate, and the decomposition product of hamigeran D, C(21)H(28)BrNO(4), namely 2-(8-bromo-2beta,7-dimethyl-4-oxo-1,3alpha-benzoxazan-5-yl)-3-isopropylcyclopentylacetic acid.
authors.affiliation: Department of Chemistry, University of Auckland, Private Bag 92019, Auckland, New Zealand.
authors.forename: R C
authors.initials: RC
authors.lastname: Cambie
authors.forename: C E
authors.initials: CE
authors.lastname: Rickard
authors.forename: P S
authors.initials: PS
authors.lastname: Rutledge
authors.forename: K D
authors.initials: KD
authors.lastname: Wellington
mesh_terms: D000818:Animals; D018360:Crystallography, X-Ray; D003517:Cyclopentanes / Q000737:chemistry*; D006860:Hydrogen Bonding; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D009281:Naphthalenes / Q000737:chemistry*; D011161:Porifera / Q000737:chemistry*
chemical_list: D003517:Cyclopentanes; D009281:Naphthalenes; C435289:hamigerin A; C435290:hamigerin D