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68020-40-6

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68020-40-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 68020-40-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,8,0,2 and 0 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 68020-40:
(7*6)+(6*8)+(5*0)+(4*2)+(3*0)+(2*4)+(1*0)=106
106 % 10 = 6
So 68020-40-6 is a valid CAS Registry Number.

68020-40-6Relevant articles and documents

Substituted 6,7-dihydroimidazo[1,2-al]purin-9 (4H)-ones

Temple Jr.,Yevich,Catt,Owens,Hanning,Covington,Seidehamel,Dungan

, p. 1188 - 1198 (2007/10/02)

The synthesis of a series of substituted 6,7-dihydroimidazo[1,2-a]purin-9(4H)-ones is described. Several members of the series exhibit enhanced antiallergic and bronchodilator activity and reduced side effects as compared to theophylline. Structure-activity relationships and metabolic considerations are discussed for the series. Analogues substituted with a 4-(4-chlorobenzyl) moiety, such as 33 and 40, show an optimal balance of antiallergic and bronchodilator activity and are of particular interest. Compound 33 is significantly more potent than theophylline against both metacholine- and antigen-induced bronchospasms, does not affect spontaneous motor activity, and shows minimal cardiovascular effects in the rat.

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