Marine Natural Products. XV. : Chemical Constituents of an Okinawan Soft Coral of Xenia sp. (Xeniidae)

Four new polyhydroxysterols, named xeniasterol-a (4), xeniasterol-b (5), xeniasterol-c (6), and xeniasterol-d (7), were isolated from an Okinawan soft coral of Xenia sp. (Xeniidae). On the basis of chemical and physicochemical evidence, the structures of xeniasterol-a, -b, -c, and -d have been eluci...

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Published inChemical & pharmaceutical bulletin Vol. 34; no. 11; pp. 4590 - 4596
Main Authors KITAGAWA, ISAO, KOBAYASHI, MOTOMASA, ZHENG, CUI, KIYOTA, YUTAKA, OHNISHI, MAYUMI
Format Journal Article
LanguageEnglish
Published Tokyo The Pharmaceutical Society of Japan 1986
Maruzen
Subjects
Biological and medical sciences
General pharmacology
germacrene-c
Marine
Medical sciences
Pharmacognosy. Homeopathy. Health food
Pharmacology. Drug treatments
Xenia
Marine environment
Coelenterata
Molecular structure
Cnidaria
Animal origin
Isolation
Chemical composition
Invertebrata
Physicochemical properties
Sterol
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Summary:Four new polyhydroxysterols, named xeniasterol-a (4), xeniasterol-b (5), xeniasterol-c (6), and xeniasterol-d (7), were isolated from an Okinawan soft coral of Xenia sp. (Xeniidae). On the basis of chemical and physicochemical evidence, the structures of xeniasterol-a, -b, -c, and -d have been elucidated respectively as 7-O-acetylergost-22E-ene-3β, 5α, 6β, 7β-tetraol (4), 7-O-acetylergosta-3β, 5α, 6β, 7β-tetraol (5), gorgosta-3β, 5α, 6β-triol (6), and 7-O-acetylgorgosta-3β, 5α, 6β, 7β-tetraol (7). Germacrene-c (1) was also isolated from the same soft coral together with two guaiane-type compounds (2, 3), and it has been shown that germacrene-c (1) is readily air-oxidized to yield these cyclization products (2, 3).
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ISSN:0009-2363
1347-5223
DOI:10.1248/cpb.34.4590