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1171982-54-9

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1171982-54-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1171982-54-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,7,1,9,8 and 2 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 1171982-54:
(9*1)+(8*1)+(7*7)+(6*1)+(5*9)+(4*8)+(3*2)+(2*5)+(1*4)=169
169 % 10 = 9
So 1171982-54-9 is a valid CAS Registry Number.

1171982-54-9Downstream Products

1171982-54-9Relevant articles and documents

Three-component condensation of 5-aminopyrazole derivatives with isatins and Meldrums acid. Synthesis of 1, 7-dihydrospiro[pyrazolo[3, 4-b]-pyridine-4, 3' -indole]-2' , 6(1 H, 5H)-diones

Lichitsky,Komogortsev,Dudinov,Krayushkin,Zelinsky

, p. 1504 - 1508 (2009)

A new method for the synthesis of hitherto unknown substituted 1, 7-dihydrospiro-[pyrazolo[3, 4-b]pyridine-4, 3'-indole]-2', 6(1'i/, 5i/)-diones based on three-component condensation of 5-aminopyrazoles with Meldrum's acid and isatins is developed.

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