tert-Butyl 2-((2,3-dihydro-1H-inden-2-yl)amino)-7,8-dihydropyrido[4,3-d]pyrimidine-6(5H)-carboxylate CAS 1619971-56-0
| CAS No. | 1619971-56-0 |
| Molecular Formula | C21H26N4O2 |
| Molecular Weight | 366.46 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
tert-Butyl 2-((2,3-dihydro-1H-inden-2-yl)amino)-7,8-dihydropyrido[4,3-d]pyrimidine-6(5H)-carboxylate (CAS 1619971-56-0), molecular formula C21H26N4O2 and molecular weight 366.46 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C21H26N4O2, tert-Butyl 2-((2,3-dihydro-1H-inden-2-yl)amino)-7,8-dihydropyrido[4,3-d]pyrimidine-6(5H)-carboxylate contains a steroid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 366.46 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C21H26N4O2 |
| Molecular Weight | 366.46 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1993 |
| Nitrogen Atoms | 4 |
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- Semaglutide impurity 93 (CAS CATO-C4X-222693)
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