Factory Supply Nonsteroidal Oestromenin Des CAS 56-53-1 Diethylstilbestrol with Best Price

Details:

Product Name: Diethylstilbestrol
Synonyms: neo-oestranol1;neo-oestranoli;New-Estranol 1;NSC-3070;OeKolp;Oestrol vetag;oestrolvetag;Oestromenin
CAS: 56-53-1
MF: C18H20O2
MW: 268.35
EINECS: 200-278-5
Melting point: 170-172 °C(lit.)
Boiling point: 351.51°C
Density: 1.1096
Storage temp.: 0-6°C
Appearance: white crystalline powder
Uses:A synthetic, nonsteroidal estrogen. Recomended solvents are DMSO, DMF and ethanol, even in these solvents do not store in solution for any prolonged period of time.

    

At first glance, it might be surprising that synthetic nonsteroidal molecules such as diethylstilbestrol (DES) could have the same activity as estradiol or other estrogens. DES can be viewed, however, as a form of estradiol with rings B and C open and a six-carbon ring D. The activity of DES analogs was explained in 1946. It was proposed that the distance between the two DES ph enol OH groups was the same as the 3-OH to 17-OH distance of estradiol; therefore, they could both fit the same receptor. Medicinal chemists have shown the OH-to-OH distance to be actually 12.1 in DES and 10.9 in estradiol. In aqueous solution, however, estradiol has two water molecules that are hydrogen bonded to the 17-OH. If one of the two water molecules is included in the distance measurement, there is a perfect fit with the two OH groups of DES. This suggests that water may have an important role for estradiol in its receptor site.
It is now generally accepted that the estrogens must have a pheno lic moiety for binding, but some investigators propose that the receptor may be flexible enough to accommodate varying distances between the two key hydroxyls. This point about estrogens needing a ph enolic ring for high-affinity binding to the ER is critical. Steroids with a p henolic A ring and related phe nolic compounds lack high-affinity binding to the other steroid hormone receptors.

 

By Express		By Air		By Sea
Suitable for under 50kg Fast: 3-7 days High cost Door to door service, easy to pick up the goods		Suitable for more than 50kg Fast: 3-7 days High cost Port to port, professional broker needed		Suitable for more than 500kg Slow: 7-45 days Low cost Port to port, professional broker needed

 

Xi'an Julong Bio-Tech Co., Ltd. is located in Xi'an City, Shaanxi Province, China. It is a biotechnology enterprise engaged in the research, development, production and sales of animal and plant extracts, cosmetics, pharmaceutical raw materials and intermediates. The company has complete experimental facilities. And advanced testing instruments ensure the stability of product quality from all aspects. The company has a complete sales service system, the products are exported to countries all over the world, and have won a good international reputation with excellent quality and excellent service.
The company has been adhering to the basic principles of "integrity, quality, service, and win-win" to serve customers, constantly strict requirements, set goals, and implement win-win development.

 

1. All inquiries will be replied within 12 hours.

2. Dedication to quality, supply & service.

3. Strictly on selecting raw materials.

3. OEM/ODM Available.

4. Reasonable & competitive price, fast lead time.

5. Sample is available for your evaluation & Formulation development.

6. Faster delivery:Sample order in stock and 3-7 days for bulk production.

7. We have strong cooperation with DHL, TNT, UPS, FEDEX, EMS. Or you also can choose your own shipping forwarder.

8. After-Sale Service:

1) International Authorized Third-Party Test For The Products You Demand.

2) 30 Days Warranty of quality of goods.

 

 

Q: What's your MOQ
A: For the high value product, our MOQ starts from 1g and generally starts from 10gs. For other low, price product, our MOQ starts from 100g and 1kg.
Q: Is there a discount
A: Yes, for larger quantity, we always support with better price. 

Q: How to confirm the Product Quality before placing orders
A: You can get free samples for some products, you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests, we will manufacture the products according to your requests
Q: How to start orders or make payments
A: You can send our your Purchase order (if your company has), or just send a simple confirmation by email or by Trade Manager, and we will send you Proforma Invoice with our bank details for your confirmation, then you can make payment accordingly.

Q: How do you treat quality complaint
First of all, our quality control will reduce the quality problem to near zero. If there is a quality problem caused by us, we will send you free goods for replacement or refund your loss.