Complaint
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
Description:
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 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 phenolic 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 phenolic ring for high-affinity binding to the ER is critical. Steroids with a phenolic A ring and related phenolic compounds lack high-affinity binding to the other steroid hormone receptors.
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.
1. Rich experience: Our company is a professional production leading factory in China in pharmaceutical area of many years.
2. Top quality: High quality guaranteed, once any problem is found, the package would be reshipped for you .
3. Security Shipping: Shipping by express (FedEx,UPS,DHL,EMS), by air. The most professional forwarder would be recommanded for you.
4. Fast delivery: We have stock, so we can delivery quickly once payment is received.
5. Quality service: We will give you warm after-sale service,if any question we will reply you within 24 hours.
6. Competitive prices: A discount would be given when you make a large order.
| Make an order | Please make clear what product and what quantity you need |
| Quote | Prices and Specifications details would be offered for you to consider and confirm |
| Payment ways | Bank Transfer, Western Union, Money Gram and Bitcoin |
| Delivery ways | All Express Modes(EMS, DHL, TNT, FedEx, UPS, etc.) |
| Shipping address | Provide your Valid and Correct destination address info(if possible with post code, phone number). |
| Packing | Select best ways according to quantity and safety degree(Super discreet, professional and experienced) |
| Lead time | Within 8 hours upon receipt of payment |
| Package picture | Photos of package would be offered to tell apart the items |
| Tracking number | Offered once it is released |
| Shipping time | 3-7 working days (Door-to-Door) |
| After-sale service | 24/7 Online for any problems |
Our factory:
Our laboratory:
Our warehouse:
Hubei Yuanmeng Biological Technology Co., Ltd., which is located in Wuhan, China. We are specializing in the exportation of APIs, and plant extracts ect.
Our products has been exported to America, Australia, Brazil, the Europe, Middle East and other areas in the world. We have established close and stable cooperative relationships with over 200 domestic pharmaceutical and chemical enterprises. With high quality and favorable price, we′ re pleased to get your inquiry and we will reply you as soon as possible.
We will continue to forge ahead and strive hard for excellence, keep on exploring and progressing to develop more high-tech products with superior quality, to satisfy increasing demand of the clients, and create more value for our partners!
Contact us!
Hubei Yuanmeng Biological Technology Co., Ltd.
Room 3820, Building 2, Vanke Golden City, Hongshan District, Wuhan, Hubei, China
Fiona Wei / CEO
