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GYMNASTERONE B

Year of first report:1998
Formula:C28H40O3
Molecular weight:424
Occurence in plants:
Gymnasella dankaliensis [fungal strain from sponge] » Images of Gymnasella dankaliensis Wikipedia: <br />
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Occurence in animals:
 
GYMNASTERONE B

MASS SPECTRUM

EI-MS m/z (relative intensity %)
CI-MS (NH3) m/zHR-EIMS m/z

CARBON NMR

PROTON NMR

CDCl3
0134.82
0236.90
03207.86
0439.62
0556.12
06198.19
07119.77
08158.64
0938.96
1037.43
1120.54
1238.99
1345.60
1471.91
1569.01
1629.48
1753.22
1815.81
1922.68
2038.30
2123.03
22133.54
23133.31
2443.12
2533.09
2619.74
2720.04
2817.74
CDCl3
01-Ha2.14 (ddd, 14.0, 6.8, 3.0)
01-He1.61 (td, 14.0, 4.9)
02-Ha2.53 (ddd, 16.0, 14.0, 6.8)
02-He2.37 (m)
04-Ha2.28 (dd, 14.9, 13.7)
04-He2.33 (m)
05-H2.43 (dd, 13.7, 5.3)
07-H6.06 (d, 2.6)
09-H2.93 (ddd, 7.8, 6.8, 2.6)
11-Ha1.81 (m) ?
11-He?
12-Ha1.68 (m)
12-He1.84 (m)
15-H3.18 (d, 2.0)
16-Ha2.03 (ddd, 15.2, 10.1, 2.0)
16-Hb2.09 (dd, 15.2, 3.7)
17-H1.72 (ddd, 15.2, 6.0, 3.7)
18-Me1.13 s)
19-Me1.08 (s)
20-H2.33 (m)
21-Me0.95 (d, 7.4)
22-H5.28 (dd, 15.6, 8.0)
23-H5.20 (dd, 15.6, 7.8)
24-H1.92 (d quintet, 7.8, 6.9)
25-H1.49 (octet, 6.9)
26-Me0.84 (d, 6.9)
27-Me0.86 (d, 6.9)
28-Me0.96 (d, 6.9)

PHYSICAL PROPERTIES

M.P.197-199 ░C;
[α]D20- 76.3 ░ (c 0.76; CHCl3)
IR (KBr) ν max (cm-1)1719, 1657, 1625
UV (EtOH) λ max (log ε)255 (4.13) ;

CHROMATOGRAPHY

 

BIOLOGICAL ACTIVITIES

 

REFERENCES

First isolationAMAGATA, T. et al. (1998) Tetrahedron Lett., 39, 3773-3774 Search more

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© UniversitÚ Pierre & Marie Curie, Paris 6, France
© Institute of Organic Chemistry and Biochemistry, Academy of Sciences, Prague, Czech Republic
© Institut National de la Recherche Agronomique, Versailles, France
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