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143771-90-8

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143771-90-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 143771-90-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,7,7 and 1 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 143771-90:
(8*1)+(7*4)+(6*3)+(5*7)+(4*7)+(3*1)+(2*9)+(1*0)=138
138 % 10 = 8
So 143771-90-8 is a valid CAS Registry Number.

143771-90-8Relevant articles and documents

Synthesis and diuretic activity of bicyclic fused heterocycles containing oxime-O-sulfonic acid moiety

Nishijima, Kazumi,Nishida, Hidemitsu,Yamashita, Yoshiaki,Ito, Manabu,Onuki, Yoshiaki,Mizota, Masahiro,Miyano, Sotaro

, p. 227 - 240 (2007/10/03)

In order to investigate the origin of the loop-type diuretic activity of M17055 (1), several variants (3-9) were designed and synthesized by modifying the quinolinone skeleton, and their diuretic activities were compared with the lead 1 and furosemide in dogs. It was found that the negative charge distribution pattern afforded by the dispositional arrangement of the 4- oxime-O-sulfonic acid and 1-N-acyl carbonyl moiety attached to the tetrahydropyridine ring system is inevitable for the development of the activity, which strongly supports the previously proposed model for the active site of the Na+-K+-2Cl- cotransporter. Also reported is the first synthesis of the dihydrothieno[3,2-b]pyridine-7(4H)-one ring system required in the synthesis of compound 9. (C) 2000 Editions scientifiques et medicales Elsevier SAS.

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