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Merck
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L6545

Sigma-Aldrich

Letrozole

≥98% (HPLC), powder, non-steroidal aromatase inhibitor

Sinonimo/i:

4,4′-(1H-1,2,4-Triazol-1-ylmethylene)bisbenzonitrile

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About This Item

Formula empirica (notazione di Hill):
C17H11N5
Numero CAS:
112809-51-5
Peso molecolare:
285.30
Numero MDL:
MFCD00866241
Codice UNSPSC:
51111800
ID PubChem:
329817641
NACRES:
NA.77

product name

Letrozole, ≥98% (HPLC)

Saggio

≥98% (HPLC)

Forma fisica

powder

Colore

white to off-white

Solubilità

DMSO: >50 mg/mL

Ideatore

Novartis

Temperatura di conservazione

2-8°C

Stringa SMILE

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
HPJKCIUCZWXJDR-UHFFFAOYSA-N

Informazioni sul gene

human ... CYP19A1(1588)

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Applicazioni

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)

Azioni biochim/fisiol

Letrozole acts as an adjuvant agent and is used to treat breast cancer.
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.

Caratteristiche e vantaggi

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.

Pittogrammi

Health hazard
GHS08

Avvertenze

Warning

Indicazioni di pericolo

H361fd,H373

Classi di pericolo

Repr. 2 - STOT RE 2

Codice della classe di stoccaggio

11 - Combustible Solids

Classe di pericolosità dell'acqua (WGK)

WGK 3

Punto d’infiammabilità (°F)

Not applicable

Punto d’infiammabilità (°C)

Not applicable

Certificati d'analisi (COA)

Cerca il Certificati d'analisi (COA) digitando il numero di lotto/batch corrispondente. I numeri di lotto o di batch sono stampati sull'etichetta dei prodotti dopo la parola ‘Lotto’ o ‘Batch’.

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USP

USP

1356982

Letrozole Related Compound A

PF-05212384 ≥98% (HPLC)

Sigma-Aldrich

PZ0281

PF-05212384

PHTPP ≥98% (HPLC)

Sigma-Aldrich

SML1355

PHTPP

Capecitabine ≥98% (HPLC)

Sigma-Aldrich

SML0653

Capecitabine

Exemestane Pharmaceutical Secondary Standard; Certified Reference Material

Supelco

PHR1634

Exemestane

Drugs for Pregnant and Lactating Women E-Book (2009)
Natalia Lagunas et al.
Frontiers in neuroanatomy, 16, 902218-902218 (2022-07-12)
Sex steroid hormones, such as androgens and estrogens, are known to exert organizational action at perinatal periods and activational effects during adulthood on the brain and peripheral tissues. These organizational effects are essential for the establishment of biological axes responsible
Bianca Posocco et al.
PloS one, 15(2), e0228822-e0228822 (2020-02-08)
A novel LC-MS/MS method was developed for the quantification of the new cyclin dependent kinase inhibitors (CDKIs) palbociclib and ribociclib and the aromatase inhibitor letrozole used in combinatory regimen. The proposed method is appropriate to be applied in clinical practice
Lauren D Otto et al.
Frontiers in oncology, 12, 798704-798704 (2022-04-12)
Breast cancer is one of the most common diseases in the United States with 1 in 8 women developing the disease in her lifetime. Women who develop breast cancer are often post-menopausal and undergo a complex sequence of treatments including surgery, chemotherapy, and aromatase inhibitor therapy. Both independently and
Rob Riemsma et al.
Current medical research and opinion, 28(8), 1263-1279 (2012-06-29)
Third-generation aromatase inhibitors (letrozole, anastrozole) have shown superior efficacy in early and advanced breast cancer compared with tamoxifen. For HR+, HER2+ MBC, combination of an AI with an anti-HER2 agent (lapatinib or trastuzumab) has shown clinical benefit. Six databases were
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