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74974-42-8

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74974-42-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 74974-42-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,9,7 and 4 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 74974-42:
(7*7)+(6*4)+(5*9)+(4*7)+(3*4)+(2*4)+(1*2)=168
168 % 10 = 8
So 74974-42-8 is a valid CAS Registry Number.

74974-42-8Relevant articles and documents

On the Double Bond Isostere of the Peptide Bond: Preparation of an Enkephalin Analogue

Hann, Michael M.,Sammes, Peter G.,Kennewell, Peter D.,Taylor, John B.

, p. 307 - 314 (2007/10/02)

Methodology for preparing dipeptide analogues in which a carbon -carbon double bond replaces the normal amide bond is described.Thus, the protected tyrosylglycine analogue, (S)-trans-5-t-butyloxycarbonylamino-6-(4-t-butoxyphenyl)hex-3-enoic acid has been synthesised and incorporated into the Leu-enkephalin analogue (3) by condensation with glycylphenylalanyl-leucine.The enkephalin analogue retained biological activity.The significance of this isosteric replacement of the amide group is discussed.

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