Letrozole Cas No: 112809-51-5

Name: Letrozole
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Classification	Organic Chemicals
Chemical Name	Letrozole
CAS No	112809-51-5
EINECS No	C17H11N5
Grade	Medicine Grade
Usage	Letrozole is part of a new generation of highly selective aromatase inhibitors and is an artificially synthesized benzotriazole derivative. Letrozole inhibits aromatase to lower estrogen levels, thus preventing estrogen from stimulating tumor growth. Its in vivo activity is 150-250 times stronger than that of first generation aromatase inhibitor Amarante. As it is highly selective, it will not impact glucocorticoid, mineralocorticoid and thyroid functions; even at high dosages, it will not have any inhibiting effects on adrenal corticosteroid secretion, giving it a high treatment index. Letrozole has no latent toxicity towards any bodily systems and target organs, has no mutagenicity and carcinogenic effects, has minimal toxic side effects, is well-tolerated, and has stronger anticancer effects than other aromatase inhibitors and antiestrogen drugs. Letrozole is suitable for advanced breast cancer postmenopausal patients who have not responded to estrogen-suppressing treatment and for early breast cancer treatment. It is used to treat postmenopausal patients with advanced breast cancer and serves as a second-line treatment to follow unsuccessful antiestrogen treatment. Compared to the current standard Tamoxifen treatment, Letrozole can better prevent the risk of breast cancer recurrence.Side effects Randomized grouping studies have shown that daily oral ingestion of 2.5mg Letrozole leads to a 33% rate of drug-related negative reactions, a percentage much lower than AG groupaEURtms 46%. Negative reactions to Letrozole are mostly mild or moderate, consisting mostly of nausea (2-9%), headache (0-7%), bone pain (4-10%), hot flashes (0-9%) and weight gain (2-8%). Other uncommon side effects include constipation, diarrhea, itching, rash, joint pain, chest pain, abdominal pain, fatigue, insomnia, dizziness, edema, high blood pressure, arrhythmia, thrombosis, dyspnea, vaginal bleeding, etc.Chemical Properties white to light yellow crystalUses A nonsteroidal aromatase inhibitor structurally related to Fadrozole. Antineoplastic
Payment Terms	Paypal, Western Union, Telegraphic Transfer (T/T)
Main Export Market(s)	South America, Africa, Asia
Main Domestic Market	North India