title: New meroterpenoids from the marine sponge Aka coralliphaga.
abstract: Three new sulfated meroterpenoids containing sesquiterpene and hydroquinone moieties, namely siphonodictyal A sulfate (1), akadisulfate A (2) and akadisulfate B (3), along with the known siphonodictyal B3 and bis(sulfato)-cyclosiphonodictyol A were isolated from the sponge Aka coralliphaga. Their structures were elucidated on the basis of spectroscopic data. Akadisulfate B and siphonodictyal B3 showed a radical-scavenging activity comparable with that of the known lipophylic antioxidant BHT.
authors.affiliation: Laboratory of Chemistry MaNaPro, Pacific Institute of Bioorganic Chemistry of the Russian Academy of Sciences, 690022 Vladivostok, Russia. shubina@piboc.dvo.ru
authors.forename: Larisa K
authors.initials: LK
authors.lastname: Shubina
authors.forename: Anatoly I
authors.initials: AI
authors.lastname: Kalinovsky
authors.forename: Tatyana N
authors.initials: TN
authors.lastname: Makarieva
authors.forename: Sergey N
authors.initials: SN
authors.lastname: Fedorov
authors.forename: Sergey A
authors.initials: SA
authors.lastname: Dyshlovoy
authors.forename: Pavel S
authors.initials: PS
authors.lastname: Dmitrenok
authors.forename: Irina I
authors.initials: II
authors.lastname: Kapustina
authors.forename: Ernesto
authors.initials: E
authors.lastname: Mollo
authors.forename: Natalia K
authors.initials: NK
authors.lastname: Utkina
authors.forename: Vladimir B
authors.initials: VB
authors.lastname: Krasokhin
authors.forename: Vladimir A
authors.initials: VA
authors.lastname: Denisenko
authors.forename: Valentin A
authors.initials: VA
authors.lastname: Stonik
mesh_terms: D000818:Animals; D016166:Free Radical Scavengers / Q000032:analysis; D015394:Molecular Structure; D011161:Porifera / Q000737:chemistry*; D013729:Terpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D016166:Free Radical Scavengers; D013729:Terpenes