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548942-89-8

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548942-89-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 548942-89-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,4,8,9,4 and 2 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 548942-89:
(8*5)+(7*4)+(6*8)+(5*9)+(4*4)+(3*2)+(2*8)+(1*9)=208
208 % 10 = 8
So 548942-89-8 is a valid CAS Registry Number.

548942-89-8Relevant articles and documents

1,3-Dialkyl-8-(hetero)aryl-9-OH-9-deazaxanthines as potent A2B adenosine receptor antagonists: Design, synthesis, structure-affinity and structure-selectivity relationships

Stefanachi, Angela,Nicolotti, Orazio,Leonetti, Francesco,Cellamare, Saverio,Campagna, Francesco,Loza, Maria Isabel,Brea, Jose Manuel,Mazza, Fernando,Gavuzzo, Enrico,Carotti, Angelo

experimental part, p. 9780 - 9789 (2009/04/11)

A number of 1,3-dialkyl-8-(hetero)aryl-9-OH-9-deazaxanthines were prepared and evaluated as ligands of recombinant human adenosine receptors (hARs). Several 1,3-dipropyl derivatives endowed with nanomolar binding affinity at hA2B receptors, but poor selectivity over hA2A, hA1 and hA3 AR subtypes were identified. A comparison with the corresponding 7-OH- and 7,9-unsubstituted-deazaxanthines revealed that 9-OH-9-deazaxanthines are more potent hA2B ligands with lower partition coefficients and higher water solubility compared to the other two congeneric classes of deazaxanthines. An optimization of the para-substituent of the 8-phenyl ring of 9-OH-9-deazaxanthines led to the discovery of compound 38, which exhibited outstanding hA2B affinity (Ki = 1.0 nM), good selectivity over hA2A, hA1 and hA3 (selectivity indices = 100, 79 and 1290, respectively) and excellent antagonist potency in a functional assay on rat A2B (pA2B = 9.33).

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