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4621-44-7

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4621-44-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4621-44-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,6,2 and 1 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 4621-44:
(6*4)+(5*6)+(4*2)+(3*1)+(2*4)+(1*4)=77
77 % 10 = 7
So 4621-44-7 is a valid CAS Registry Number.

4621-44-7Relevant articles and documents

Design, synthesis and SAR study of hydroxychalcone inhibitors of human β-secretase (BACE1)

Ma, Lei,Yang, Zhengyi,Li, Chenjing,Zhu, Zhiyuan,Shen, Xu,Hu, Lihong

, p. 643 - 648 (2012/04/10)

According to the structural characteristics of isoliquiritigenin from Glycyrrhiza uralensis, a series of hydroxychalcones has been designed, synthesized and evaluated for their in vitro inhibitory activities of β-secretase (BACE1). Structure-activity relationship study suggested that inhibitory activity against BACE1 was governed to a greater extent by the hydroxyl substituent on A-and B-ring of the chalcone, and the most active compound was substituted with four hydroxyl group (17, IC50=0.27 μM).

Syntheses of Isoflavones and Isoflavone Glycosides, and Their Inhibitory Activity against Bovine Liver &β-Galactosidase

Nishiyama, Kiyotoshi,Esaki, Sachiko,Deguchi, Ikuko,Sugiyama, Naoko,Kamiya, Shintaro

, p. 107 - 114 (2007/10/02)

To clarify the relationship between the structure and inhibitory action toward β-D-galactosidase (EC 3.2.1.21) of isoflavones and isoflavone glycosides, a number of polyhydroxyisoflavones, and the α-L-rhamnosides and β-L-quinovosides of daidzein and genistein were synthesized.Among the polyhydroxyisoflavones, 2',3',4',7-tetrahydroxyisoflavone showed the strongest inhibitory activity (Ki = 26 * 10-6 M).Among the glycosides, all the L-rhamnosides were strong inhibitors, of which genistein 4',7-di-O-α-L-rhamnoside was the strongest (Ki = 4.44 * 10-6 M), while all the isoflavone β-L-quinovosides were considerably weak or possessed no inhibition.

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