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VENUSTONE

Year of first report:1995
Formula:C31H50O9
Molecular weight:566
Occurence in plants:
Penstemon venustus [Scrophulariaceae] » Images of Penstemon venustus Wikipedia: <br />
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Occurence in animals:
 
VENUSTONE

MASS SPECTRUM

CI-MS (NH3) m/z 
FAB-MS (negative-ion mode) m/z (relative intensity %)565 [M-H]- (7), 479 (12), 183 (100), 103 (20), 91 (43)
EI-MS m/z (relative intensity %)530 [M-2H2O]+ (0.5), 512 (0.9), 494 (1), 468 (2), 444 (2), 426 (11), 387 (6), 363 (32), 345 (100), 327 (40), 285 (18), 269 (16), 215 (16), 173 (19), 99 (51), 81 (28), 69 (40).
HR-MS 

CARBON NMR

PROTON NMR

CD3OD
0137.4
0268.7
0368.5
0432.8
0551.8
06206.4
07122.2
08167.8
0935.1
1039.3
1121.5
1232.6
1348.7
1485.2
1531.8
1621.5
1750.8
1818.1
1924.4
2077.6
2121.9
2280.8
2326.1
2441.5
2571.0
2629.5
2728.9
ac1'173.5
ac2'45.2
ac3'65.6
ac4'23.2
CD3OD
01-Ha1.42
01-He1.79
02-Ha3.83
03-He3.94
04-Ha1.70
04-He1.70
05-H2.38
07-H5.80 (d, 2)
09-Ha3.15
11-Ha1.69
11-He1.81
12-Ha2.15 (ddd, 13.1, 13.1, 4.9)
12-He1.86
15-Ha1.95
15-Hb1.61
16-Ha2.03
16-Hb1.75
17-H2.38
18-Me0.87 (s )
19-Me0.95 (s )
21-Me1.28 (s )
22-H4.92
23-Ha1.14
23-Hb1.47
24-Ha1.77
24-Hb1.42
26-Me1.17 (s )
27-Me1.15 (s )
H-2'a2.43 (dd, 15.1, 8.3)
H-2'b2.57 (dd, 15.1, 4.8)
H-3'4.23
H4'-Me1.23 (d, 6.2)

PHYSICAL PROPERTIES

M.P. 
[α]D20+ 57 ° (c 0.2; MeOH)
IR (KBr) ν max (cm-1) 
UV (EtOH) λ max (log ε) 

CHROMATOGRAPHY

HPTLC 
TLC 
GLC 
HPLCRP-HPLC : Lichrosorb RP-18 (H2O-MeOH), gradient (0-32 min) : 10-93% MeOH, flow-rate 2 ml.min-1.

BIOLOGICAL ACTIVITIES

 

REFERENCES

First isolationROTH, U. et al. (1995) Phytochemistry 39, 941-942 Search more

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