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81657-18-3

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81657-18-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81657-18-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,6,5 and 7 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 81657-18:
(7*8)+(6*1)+(5*6)+(4*5)+(3*7)+(2*1)+(1*8)=143
143 % 10 = 3
So 81657-18-3 is a valid CAS Registry Number.

81657-18-3Relevant articles and documents

Synthesis and activity of a newly isolated analgesic pentapeptide, neo-kyotorphin

Kitagawa,Kawai,Kiso,Akita,Fukui,Amano,Takagi

, p. 2349 - 2352 (2007/10/02)

A newly isolated bovine brain pentapeptide, Thr-Ser-Lys-Tyr-Arg (neo-kyotorphin), which contains the Tyr-Arg (kyotorphin) unit at its carboxyl terminal portion, was synthesized by using the TFMSA-TFA-thioanisole deprotecting procedure. The synthetic pepti

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