(2S,3R,4R,5S,6R)-3-(1,3-dioxoisoindolin-2-yl)-2-(ethylthio)-5-hydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-4-yl acetate CAS 189188-19-0
| CAS No. | 189188-19-0 |
| Molecular Formula | C18H21NO7S |
| Molecular Weight | 395.43 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 395.43 g/mol gives (2S,3R,4R,5S,6R)-3-(1,3-dioxoisoindolin-2-yl)-2-(ethylthio)-5-hydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-4-yl acetate distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
(2S,3R,4R,5S,6R)-3-(1,3-dioxoisoindolin-2-yl)-2-(ethylthio)-5-hydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-4-yl acetate (CAS 189188-19-0) is a high-purity analytical reference standard with the molecular formula C18H21NO7S and a molecular weight of 395.43 g/mol.
The molecular framework of (2S,3R,4R,5S,6R)-3-(1,3-dioxoisoindolin-2-yl)-2-(ethylthio)-5-hydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-4-yl acetate (C18H21NO7S) is characterized by a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
As a certified reference material (CRM), (2S,3R,4R,5S,6R)-3-(1,3-dioxoisoindolin-2-yl)-2-(ethylthio)-5-hydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-4-yl acetate meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C18H21NO7S |
| Molecular Weight | 395.43 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2011 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Recommended Standards
- FDU-PB-22 (CAS 1883284-94-3)
- 1'-(2-(1,3-Dioxoisoindolin-2-yl)ethyl)-6,7-dihydro-5H-spiro[benzo[b]thiophene-4,4'-imidazolidine]-2',5'-dione (CAS 848225-51-4)
- 7-(3,5-Dimethylpiperazin-1-yl)-6-fluoro-4-oxo-1-phenyl-1,4-dihydroquinoline-3-carboxylic acid (CAS 164662-44-6)
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