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11α-HYDROXY-24R,25R-AMARASTERONE A

Year of first isolation:	2025
Formula:	C₂₉H₄₈O₈
Molecular weight:	524
Occurence in plants:
Leuzea uniflora [Asteraceae] »
Occurence in animals:

11α-HYDROXY-24R,25R-AMARASTERONE A

STRUCTURE DESCRIPTORS

MASS SPECTRUM

CI-MS (NH₃) m/z	HRESIMS (positive ion mode) m/z
EI-MS m/z (relative intensity %)

CARBON NMR

PROTON NMR

DMSO-d₆
01	38.7
02	67.2
03	67.4
04	32.5
05	51.3
06	203.6
07	121.3
08	163.8
09	41.7
10	40.5
11	67.9
12	42.9
13	47.3
14	83.3
15	30.8
16	20.7
17	48.8
18	18.5
19	24.6
20	76.1
21	21.2
22	74.0
23	31.7
24	36.8
25	36.8
26	65.4
27	12.3
28	24.8
29	12.2

DMSO-d₆
01-Ha	2.46 (dd,12.6, 4.2)
01-Hb	1.14 (m)
02-Ha	3.77 (m)
03-He	3.74 (m)
04-Ha	1.45 (m)
04-Hb	1.58 (m)
05-H	2.12 (dd, 13.1, 3.8)
07-H	5.60 (d, 2.3)
09-H	2.96 (dd, 8.89, 2.5)
11-H	3.88 (m)
12-Ha	2.04 (dd, 12.0, 5.7)
12-Hb	1.94 (m)
15-Ha	1.47 (m)
15-Hb	1.77 (m)
16-Ha	1.56 (m)
16-Hb	1.88 (m)
17-H	2.22 (t, 8.9)
18-Me	0.73 (s)
19-Me	0.90 (s)
21-Me	1.05 (s)
22-H	3.21 (dd, 10.2, 2.3)
23-Ha	1.01 (m)
23-Hb	1.09 (m)
24-Ha	1.55 (m)
24-Hb	1.66 (m)
26-Ha	3.32 (d, 7.2)
26-Hb	3.21 (m)
27-Me	0.72 (d)
28-Ha	1.17 (m)
28-Hb	1.37 (m)
29-Me	0.84 (t, 7.5, 7.5)

PHYSICAL PROPERTIES

M.P.	â€” Â°C ;
[α]_D²⁰	+48 (c 0.1 ; MeOH)
IR (KBr) ν _max (cm^-1)
UV (MeOH) λ _max (log ε)	220, 329 nm (-) ;

CHROMATOGRAPHY

HPTLC
HPLC
GLC
TLC

BIOLOGICAL ACTIVITIES

REFERENCES

First isolation

DU, W. et al. (2025) Nat. Prod. Res. https://doi.org/10.1080/14786419.2025.2502855

Permanent link to this datasheet: 11α-HYDROXY-24R,25R-AMARASTERONE A

see Important notice
© Université 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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