L6545
Letrozole
≥98% (HPLC), powder, non-steroidal aromatase inhibitor
Synonym(s):
4,4′-(1H-1,2,4-Triazol-1-ylmethylene)bisbenzonitrile
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About This Item
Empirical Formula (Hill Notation):
C17H11N5
CAS Number:
Molecular Weight:
285.30
UNSPSC Code:
51111800
PubChem Substance ID:
NACRES:
NA.77
MDL number:
Product Name
Letrozole, ≥98% (HPLC)
Quality Level
assay
≥98% (HPLC)
form
powder
color
white to off-white
solubility
DMSO: >50 mg/mL
originator
Novartis
storage temp.
2-8°C
SMILES string
N#CC(C=C1)=CC=C1C(N2C=NC=N2)C3=CC=C(C#N)C=C3
InChI
1S/C17H11N5/c18-9-13-1-5-15(6-2-13)17(22-12-20-11-21-22)16-7-3-14(10-19)4-8-16/h1-8,11-12,17H
InChI key
HPJKCIUCZWXJDR-UHFFFAOYSA-N
Gene Information
human ... CYP19A1(1588)
Application
Letrozole has been used:
- in organoid growth assay to determine its inhibitory capacity(48)
- to investigate steroid receptor coactivator-1 (SRC-1) mediated endogenous estrogen regulation of hippocampal PSD-95(49)
- to determine its effects on tumor-induced hyperalgesia(50)
- for hormonal manipulation in rats(51)
- to study its effects on lipocalin-2 (Lcn2)(52)
- to determine its effects on mechanical hyperalgesia and aromatase expression(53)
Biochem/physiol Actions
Letrozole acts as an adjuvant agent and is used to treat breast cancer.
Letrozole is a non-steroidal aromatase inhibitor.
Letrozole is a third generation nonsteroidal aromatase inhibitor. It is a competitive inhibitor of the aromatase enzyme system and thus inhibits the conversion of androgens to estrogens. Letrozole inhibits the aromatase enzyme by competitively binding to the heme of the cytochrome P450 subunit of the enzyme, resulting in a reduction of estrogen biosynthesis in all tissues.
Features and Benefits
This compound is featured on the Nuclear Receptors (Steroids) page of the Handbook of Receptor Classification and Signal Transduction. To browse other handbook pages, click here.
This compound was developed by Novartis. To browse the list of other pharma-developed compounds and Approved Drugs/Drug Candidates, click here.
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signalword
Warning
hcodes
Hazard Classifications
Repr. 2 - STOT RE 2
Storage Class
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
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Drugs for Pregnant and Lactating Women E-Book (2009)
G Allevi et al.
British journal of cancer, 108(8), 1587-1592 (2013-04-13)
The objective of this study was to determine the optimal scheduling of 2.5 mg daily letrozole in neoadjuvant breast cancer patients to obtain pathological complete response (pathCR) and assess Ki-67 expression as an early predictor of response. This single institution
Pamela J Goodwin et al.
Journal of clinical oncology : official journal of the American Society of Clinical Oncology, 32(21), 2231-2239 (2014-06-18)
Obesity is associated with poor outcomes in women with operable breast cancer. Lifestyle interventions (LIs) that help women reduce their weight may improve outcomes. We conducted a multicenter randomized trial comparing mail-based delivery of general health information alone or combined
Global Trade Item Number
| SKU | GTIN |
|---|---|
| L6545-10MG | 04061833958919 |
| L6545-50MG | 04061833958926 |