Chemical and Pharmaceutical Bulletin
Online ISSN : 1347-5223
Print ISSN : 0009-2363
ISSN-L : 0009-2363
HALENAQUINOL AND HALENAQUINOL SULFATE, PENTACYCLIC HYDROQUINONES FROM THE OKINAWAN MARINE SPONGE XESTOSPONGIA SAPRA
Motomasa Kobayashi, Nobuyoshi Shimizu, Yoshimasa Kyogoku, Isao Kitagawa
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Keywords: hydroquinone photo-oxidation
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1985 Volume 33 Issue 3 Pages 1305-1308

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Abstract
Two new pentacyclic hydroquinones named halenaquinol (1) and halenaquinol sulfate (2) were isolated from the okinawan marine sponge Xestospongia sapra and their structures were elucidated on the basis of chemical and physicochemical evidence which included a quantitative photo-oxidative conversion of 1 to halenaquinone (3).
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© The Pharmaceutical Society of Japan
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