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857550-48-2

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857550-48-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 857550-48-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,5,7,5,5 and 0 respectively; the second part has 2 digits, 4 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 857550-48:
(8*8)+(7*5)+(6*7)+(5*5)+(4*5)+(3*0)+(2*4)+(1*8)=202
202 % 10 = 2
So 857550-48-2 is a valid CAS Registry Number.

857550-48-2Relevant articles and documents

Potent nonsteroidal progesterone receptor agonists: Synthesis and SAR study of 6-aryl benzoxazines

Zhang, Puwen,Terefenko, Eugene A.,Fensome, Andrew,Zhang, Zhiming,Zhu, Yuan,Cohen, Jeffrey,Winneker, Richard,Wrobel, Jay,Yardley, John

, p. 787 - 790 (2002)

Novel 6-aryl benzoxazines were prepared and examined as progesterone receptor (PR) modulators. In contrast to the structurally related 6-aryl dihydroquinoline PR antagonists, the 6-aryl benzoxazines were potent PR agonists. Compounds 4e, 5b, and 6a with the 2,4,4-trimethyl-1,4-dihydro-2H-benzo[d][1,3]oxazine core were the most potent PR agonists in the series with sub-nanomolar activities (EC50 0.20-0.35 nM). Compound 6a was more potent than progesterone (P4) in the in vivo decidualization assay in an ovariectomized female rat model by subcutaneous administration with an ED50 of 1.5 mg/kg (vs 5.62 mg/kg for P4).

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