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Xestospongia sapra

The yellow pigment halenaquinol sulfate (410) has been isolated from the Okinawan sponge Xestospongia sapra and is a pentacyclic hydroquinone [345]. The absolute stereochemistry was determined to be 6S by comparing the CD spectrum of a derivative with a theoretically calculated spectrum [346]. Theoretical calculation of CD spectra of halenaquinol sulfate (410) isolated from X. exigua and X. sapra determined that the absolute stereostructure was 12bS [347]. The pentacyclic compound, xestoquinol sulfate (411) has been isolated from an Okinawan collection of X. sapra and its structure was elucidated on the basis of spectroscopic data and a chemical conversion [348]. [Pg.677]

Xestospongia sapra 9 8 Unstable yellow solid [al577 +179° (acetonel Cd analysis... [Pg.312]

Constit. of Xestospongia sapra. Putative biosynthetic precursor to Halenaquinol, H-00028 and Xestoquinone, X-00085. Cryst. Mp 207° (synthetic), [ot] —47.5 (c, 0.747 in CHCI3) (synthetic). [Pg.327]

Kobayashi, M., Shimizu, N., Kyogoku, Y, and Kitagawa, I. (1985a) Halenaquinol and halenaquinol sulfate pentacyclic hydroquinones from the Okinawan sponge Xestospongia sapra. Chem. Pharm. Bull., 33,1305-1308. [Pg.1112]

See other pages where Xestospongia sapra is mentioned: [Pg.33]    [Pg.206]    [Pg.333]    [Pg.1065]    [Pg.1065]    [Pg.1065]    [Pg.1066]    [Pg.33]    [Pg.206]    [Pg.333]    [Pg.1065]    [Pg.1065]    [Pg.1065]    [Pg.1066]    [Pg.277]   
See also in sourсe #XX -- [ Pg.33 ]

See also in sourсe #XX -- [ Pg.15 , Pg.17 , Pg.28 , Pg.33 , Pg.312 , Pg.677 ]

See also in sourсe #XX -- [ Pg.15 , Pg.17 , Pg.33 , Pg.312 ]

See also in sourсe #XX -- [ Pg.312 ]

See also in sourсe #XX -- [ Pg.206 ]



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Xestospongia

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