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97998-66-8

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97998-66-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 97998-66-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,7,9,9 and 8 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 97998-66:
(7*9)+(6*7)+(5*9)+(4*9)+(3*8)+(2*6)+(1*6)=228
228 % 10 = 8
So 97998-66-8 is a valid CAS Registry Number.

97998-66-8Relevant articles and documents

Synthesis and Pharmacology of the Potent Angiotensin-Converting Enzyme Inhibitor N--(S)-alanyl-(S)-pyroglutamic Acid

Johnson, Alexander L.,Price, William A.,Wong, Pancras C.,Vavala, Robert F.,Stump, John M.

, p. 1596 - 1602 (2007/10/02)

Structure 3a, a potent angiotensin-converting enzyme inhibitor, was prepared in five steps from L-(+)-α-amino-4-phenylbutyric acid by construction of the activated side-chain ester 16, displacement with L-pyroglutamate ester anion, and deblocking.Diastereomer separation was accomplished by chromatography at the diester stage, 17.Pharmacological assays established that 3a parallels enalapril in its ability to inhibit converting enzyme and lower blood pressure.

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