N-Cyclopentyl-5-methyl-11-oxo-5H,5aH,6H,7H,8H,9H,11H-pyrido[2,1-b]quinazoline-3-carboxamide CAS 1574567-50-2
| CAS No. | 1574567-50-2 |
| Molecular Formula | C19H25N3O2 |
| Molecular Weight | 327.42 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
N-Cyclopentyl-5-methyl-11-oxo-5H,5aH,6H,7H,8H,9H,11H-pyrido[2,1-b]quinazoline-3-carboxamide (CAS 1574567-50-2), molecular formula C19H25N3O2 and molecular weight 327.42 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of N-Cyclopentyl-5-methyl-11-oxo-5H,5aH,6H,7H,8H,9H,11H-pyrido[2,1-b]quinazoline-3-carboxamide (C19H25N3O2) is characterized by a steroid core, an amide 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.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C19H25N3O2 |
| Molecular Weight | 327.42 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1993 |
| Nitrogen Atoms | 3 |
Related N Standards
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- 4-cyclopentyl-11-methyl-5-sulfanyl-8-thia-4,6-diazatricyclo[7.4.0.0²,⁷]trideca-1(9),2(7),5-trien-3-one (CAS 757221-99-1)
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Recommended Standards
- 1-(Mesityl(phenyl)methyl)-1H-benzo[d][1,2,3]triazole (CAS 155998-86-0)
- ((2S,6R)-4-benzyl-6-(benzyloxymethyl)morpholin-2-yl)methanol (CAS 1581750-87-9)
- tert-Butyl (R)-(3-hydroxy-1,1-diphenylpropan-2-yl)carbamate (CAS 155836-48-9)
- 1,3,3-Trimethylindolino-β-naphthopyrylospiran (CAS 1592-43-4)
- 3-Cyclopropoxy-N2,N2,N4,N4-tetramethylpyridine-2,4-dicarboxamide (CAS 1243381-95-4)
- 2-Fluoro-1-(3-methoxyphenyl)ethan-1-ol (CAS 40733-99-1)
- 5α-Androst-9(11)-ene-3,17-dione (CAS 15375-19-6)
- 2-ISoxazol-5-ylpiperidine hydrochloride (CAS 1545213-37-3)
- (3,4-Dihydroquinolin-1(2h)-yl)(thiophen-2-yl)methanone (CAS 330459-23-9)
- Warangalone (CAS 4449-55-2)
- 3-(4-Methoxyphenyl)-4-(pyrrolidin-1-ylmethyl)isoxazol-5(2H)-one (CAS 61195-04-8)
- PEGCG (CAS 507453-56-7)
- 2-Amino-4-methyl-1,3-benzothiazole-6-carboxylic acid (CAS 1071359-88-0)
- FMRF-Like Peptide from snail Helix aspersa (CAS 98495-35-3)
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