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691881-23-9

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691881-23-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 691881-23-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,9,1,8,8 and 1 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 691881-23:
(8*6)+(7*9)+(6*1)+(5*8)+(4*8)+(3*1)+(2*2)+(1*3)=199
199 % 10 = 9
So 691881-23-9 is a valid CAS Registry Number.

691881-23-9Relevant articles and documents

Synthesis and selective cyclooxygenase-2 (COX-2) inhibitory activity of a series of novel bicyclic pyrazoles

Ranatunge, Ramani R.,Garvey, David S.,Janero, David R.,Letts, L. Gordon,Martino, Allison M.,Murty, Madhavi G.,Richardson, Stewart K.,Young, Delano V.,Zemetseva, Irina S.

, p. 1357 - 1366 (2007/10/03)

Novel series of pyrazolo[5,1-b]1,3-oxazolidines, pyrazolo[5,1-b]1,3- oxazines and imidazolidino[1,2-d]pyrazoles were synthesized. These compounds were evaluated in vitro for their ability to inhibit cyclooxygenase-1 (COX-1) and cyclooxygenase-2 (COX-2) in human whole blood (HWB). Several of the compounds were found to be novel and selective COX-2 inhibitors, the most potent and selective being 1-(5-cyclohexyl (2H,3H-pyrazolo[5,1-b]-1,3- oxazolidin-6-yl)-4-(methylsulfonyl)benzene, 7a (IC5o for COX-1>100 μM; for COX-2=1.3 μM).

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