Questin
Basics
Category
Anthraquinone and quinone derivatives
IUPAC-name
1,6-dihydroxy-8-methoxy-3-methylanthracene-9,10-dione
Formula
No formula stored
Exact mass
284.06847 g/mol
Molecular weight
No weights stored
Structure
Sources
In summary, the chemical questin has been analyzed from following sources:
Note that an analysis result in the database may indicate either presence or lack thereof of a chemical in an analyzed sample.
References
- G. Chen, X. Li, F. Saleri, and M. Guo, "Analysis of flavonoids in Rhamnus davurica and its antiproliferative effects.," Molecules , vol. 21 , no. 10 , pp. 1275 , DOI: 10.3390/molecules21101275 .
Analysis results
Analysis result 1
| Detection technique | Values | Units |
|---|---|---|
| [M⁻ H]⁻ | 283 | m/z |
| MS²⁻ |
93
119 151 165 243 270 285 |
m/z |
STD
False
TLC
False
UV/Vis detector description
Mass spectrometer description
ESI-MS/MS
Organism
Rhamnus davurica
Pall.
dried, powdered
Sample note
The authentication and identification of the barks of Rhamnus davurica was performed with the researchers of this study which were assisted by the taxonomist Quangwan Hu from Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture (Wuhan Botanicl Garden), Chinese Academy of Sciences. A voucher specimen (No. 0031) was deposited in the herbarium of the Key Laboratory.
Drying temperature
40 °C
Dried material storage temperature
4 °C
Dried material storage notes
the samples were packed in sealed polyethylene bags; stored in a refrigerator until use; dark
Extraction solvents
60 % ethanol
Extraction repeats
3
Extraction time
1 h 30 min
Extraction temperature
20±5 °C
Extract drying method
evaporation under reduced pressure
Extract drying temperature
40 °C
Dried extract storage temperature
4 °C
Analysis solvents
MeOH
Detection note
Questin derives from an emodin; it's a dihydroxyanthraquinone.
References
G. Chen, X. Li, F. Saleri, and M. Guo, "Analysis of flavonoids in Rhamnus davurica and its antiproliferative effects.," Molecules , vol. 21 , no. 10 , pp. 1275 , DOI: 10.3390/molecules21101275 .
